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Portfolio Lighting: identify the product before making changes

This Portfolio PF-4300-BK Motion Sensing Porch Light: Manual, Specs, DualBrite & Troubleshooting resource is part of the Portfolio Lighting repair and maintenance library. For an existing system, identify the exact fixture or transformer model and check its label and original instructions before using broader lighting advice.

Portfolio owner’s first step: Use the Portfolio model lookup and product guides to connect this topic to your own installation.

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Match the replacement to the actual Portfolio model

For Portfolio PF-4300-BK Motion Sensing Porch Light: Manual, Specs, DualBrite & Troubleshooting, use the page’s specific product or problem as the starting point rather than a generic Portfolio Lighting rule. Preserve the exact model or item number when available, document the failed component or symptom, and record the dimensions, ratings, mounting details, and connections that control the repair decision. That evidence makes it possible to distinguish identification, diagnosis, parts matching, and complete replacement instead of treating them as the same task. Continue with Portfolio Parts once the problem has been narrowed.

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Identification: Model Number, Item Number & Manufacturer

Before ordering any parts or replacement bulbs, confirm you have the correct fixture. The PF-4300-BK has two different identification numbers that appear in different places on the packaging and documentation.

✓ Record the Model Number Inside the Fixture The official manual instructs: "Before installation, record the model number listed inside the fixture. Attach receipt in case of possible warranty issues." The model number is printed on a label inside the canopy — visible only when the fixture is removed from the wall. For a fixture already installed, the model number on the outside box or on the ManualsLib listing (at manualslib.com/manual/67284) is sufficient for parts identification purposes.

Complete Confirmed Specifications — From the Official Owner's Manual

All specifications below are drawn directly from the PF-4300-BK owner's manual (ManualsLib document 67284). These are confirmed values, not estimates.

SpecificationConfirmed ValueNotes Detection RangeUp to 30 ft (9.1 m)Varies with surrounding temperature — warmer ambient = shorter effective range (see sensor section) Sensing Angle360°Full-perimeter PIR coverage; less sensitive directly toward sensor, most sensitive to crossing motion Fixture Electrical LoadUp to 100W Maximum Tungsten IncandescentTotal across both lamp holders; 25W max per individual socket Bulb TypeCandelabra Base, Type "B", 25W MaximumE12 screw base; Type B = bullet/flame-tip shape Sensor CapacityUp to 200W (1.7A) Maximum TungstenSensor can control additional 100W beyond the fixture's own 100W load Power Requirements120 VAC, 60 HzStandard North American household current; NOT compatible with low-voltage landscape systems Operating ModesTEST, AUTO, and MANUAL MODEPlus ACCENT (DualBrite) — 4 effective modes total ON-Timer SettingsTEST, 1, 5, 10 minutesDuration light stays on after motion detection; TEST = 5 seconds DualBrite TimerOff, 3 hours, 6 hours, dusk-to-dawnSeparate switch from ON-TIME; controls accent (half-power) operation duration Housing MaterialDiecastDie-cast metal construction; weather-rated for outdoor use Color FinishBlack (BK)PF-4300-BK suffix indicates black finish ENERGY STARMeets guidelines when DualBrite offDualBrite continuous half-power draw disqualifies ENERGY STAR when active Warranty3-Year Limited WarrantyHeathCo LLC; covers factory defective parts and workmanship Installation Time30 minutes (estimated)Per manual; includes universal mounting bracket installation Minimum Mount Height8 feet (2.4 m) above ground"For best performance" per official manual ManufacturerHeathCo LLC© 2007 HeathCo LLC; service: 1-800-858-8501 (discontinued)

All values from Portfolio Motion Sensing Porch Light PF-4300-BK Owner's Manual, ManualsLib document 67284. "Tungsten" in spec entries = incandescent tungsten filament bulbs; sensor capacity ratings were established for incandescent. LED equivalents operate within these limits at far lower actual wattage. Scroll right on mobile.

Package Contents

The official manual lists these items as included in the PF-4300-BK box. If you're sourcing a used or incomplete unit, verify all of these are present before installation:

Not included, required for installation: Phillips and flathead screwdrivers; pliers; wire strippers/cutters; safety glasses; light bulb (Type B candelabra, 25W max per socket); silicone caulk (for weatherproofing the bracket-to-wall junction).

The Four Operating Modes

The PF-4300-BK has four distinct operating states controlled by two physical switches on the sensor head: the ON-TIME switch (TEST / 1 / 5 / 10 MIN) and the DualBrite switch (Off / 3H / 6H / D). Understanding what each mode does — and when the photocell overrides them — prevents most of the "my light won't work" calls.

ON-TIME switch → TEST TEST Mode

The setup and verification mode. When ON-TIME is at TEST, the light stays on for approximately 5 seconds after each motion detection event instead of the full 1/5/10 minutes. This lets you walk through the coverage area quickly during installation without waiting for full on-times to expire.

ON-TIME at 1/5/10 min — default AUTO Mode

The standard operating mode. The photocell keeps the fixture off during daylight hours. At dusk, the sensor activates automatically. When motion is detected, the light turns on at full power and stays on for the duration set on the ON-TIME switch (1, 5, or 10 minutes). Then it turns off and waits for the next motion event.

Toggle: wall switch off 1 sec, back on MANUAL Mode

Forces the light to stay on at full power for the duration set on the ON-TIME switch, without waiting for motion. Useful when you want continuous porch light for an extended entry period (hosting guests, carrying groceries) without the light cycling off between motion detections.

DualBrite switch → 3H / 6H / D ACCENT (DualBrite) Mode

The DualBrite feature runs the fixture at half power as ambient accent lighting, then switches to full power when motion is detected. The DualBrite switch sets how long the half-power accent period runs: 3 hours after dusk, 6 hours after dusk, or continuously dusk-to-dawn.

DualBrite: How the Accent Lighting Feature Works

DualBrite is a HeathCo-patented feature that gives the PF-4300-BK a two-level lighting capability — ambient half-power operation as a welcoming porch light, plus full-power response when motion triggers it.

The DualBrite Switch Settings

The DualBrite switch is separate from the ON-TIME switch and has four positions:

ENERGY STAR and DualBrite

The official manual states the PF-4300-BK "Meets the ENERGY STAR guidelines when DualBrite function is off." When DualBrite is active in any of the 3H, 6H, or D settings, the fixture draws continuous half-power load during the accent period — which doesn't qualify as the on/off motion-controlled operation that ENERGY STAR requires for lighting fixtures in this category. If ENERGY STAR compliance matters for a rebate program or utility incentive, set the DualBrite switch to Off.

Half Power Defined

The "half power" accent mode operates the lamp at reduced voltage, producing approximately half the light output compared to full-power operation. With two 25W incandescent candelabra bulbs at full power (50W total), DualBrite accent mode runs them at roughly 25W equivalent output — noticeably dimmer than full activation but sufficient for ambient porch presence lighting. With LED replacements at 4–5W each, the half-power accent output is very low-wattage — though some LED drivers don't dim gracefully at half-voltage; see the LED retrofit section for guidance on this compatibility consideration.

Check the Portfolio power system before replacing a fixture

For Portfolio PF-4300-BK Motion Sensing Porch Light: Manual, Specs, DualBrite & Troubleshooting, use the page’s specific product or problem as the starting point rather than a generic Portfolio Lighting rule. Preserve the exact model or item number when available, document the failed component or symptom, and record the dimensions, ratings, mounting details, and connections that control the repair decision. That evidence makes it possible to distinguish identification, diagnosis, parts matching, and complete replacement instead of treating them as the same task. Continue with Portfolio Parts once the problem has been narrowed.

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Mode Switching: The One-Second Toggle and Reset Procedure

The Mode Switching Summary (from the Official Manual)

To Enter This ModeAction RequiredWorks AtON-TIME Requirement TEST ModeMove ON-TIME switch to TEST positionDay & NightSwitch at TEST AUTO ModeNormal state — or power off 1 min then back onNight only (photocell)1, 5, or 10 min MANUAL ModeFlip wall switch OFF for 1 second, then back ONNight only (photocell)1, 5, or 10 min only ACCENT ModeSet DualBrite switch to 3H, 6H, or DNight only (photocell)Any setting

The Universal Reset

The official manual provides a single procedure that fixes most mode-confusion situations: "If you get confused while switching modes, turn the power off for one minute, then back on. After the calibration time the control will be in the AUTO mode." This works regardless of which mode the fixture is in. Turning off the wall switch for one full minute fully discharges the control circuit, and the 1½-minute startup calibration period returns everything to the default AUTO state.

The Calibration Wait Period

After any power restoration — whether from the breaker, a wall switch, or after the one-minute reset procedure — the fixture requires approximately 1½ minutes of calibration time before the sensor operates normally. During this calibration window, the sensor may appear to not work at all, or may trigger in an unexpected pattern. This is normal circuitry behavior, not a malfunction. Set a timer and wait the full 90 seconds before evaluating sensor function after any power-on event.

Installation: Universal Mounting Bracket Step-by-Step

The PF-4300-BK uses a universal mounting bracket that accommodates a range of standard junction box configurations. Estimated installation time per the official manual is 30 minutes.

⚠ This Is a 120V Hardwired Fixture — Not Low-Voltage The Portfolio PF-4300-BK requires 120 VAC, 60 Hz household current. It is a hardwired porch light that connects to a standard 120V junction box — it is completely different from Portfolio's low-voltage 12V landscape lighting systems. Never attempt to connect this fixture to a low-voltage landscape transformer. If you need a licensed electrician, your area's permit requirements govern. See the electrical code guide for the NEC framework around outdoor 120V fixture installation.

1

Turn off power at the circuit breaker

Shut off the circuit at the breaker panel, not just at the wall switch. Verify power is off with a non-contact voltage tester before touching any wiring. The official manual notes: "Some electrical codes require installation by a qualified electrician."

2

Install the Universal Mounting Bracket to the junction box

Attach the mounting bracket from the package to the existing junction box using the supplied hardware. The bracket is designed to accommodate standard round and square junction boxes.

3

Connect the wires

Black to black, white to white, ground to ground. Twist the matching wires together and secure with the included wire nuts. For metal junction boxes without a ground wire: if you have a metal box, you may not need the green "pigtail" ground wire — refer to local code or a licensed electrician if unsure about the grounding method.

4

Mount fixture at minimum 8 feet above the ground

The manual states: "For best performance, mount the fixture at least 8 feet (2.4 m) above the ground." Lower mounting reduces detection range effectiveness because the PIR sensor's coverage geometry is optimized for this height. Flush-mounting at 7 feet or lower reduces effective range.

5

Apply silicone caulk around the bracket-to-wall junction

The tools list specifically includes "Silicon caulk" as a required installation item. Apply a bead of exterior silicone caulk between the mounting bracket/canopy and the wall surface to prevent water intrusion into the junction box. This is a weatherproofing step that significantly extends fixture life and prevents moisture-related sensor problems.

6

Install bulbs and restore power; wait 1½ minutes for calibration

Install Type B candelabra base bulbs (25W max each) before restoring power. Turn the breaker back on. Wait the full 90-second calibration period before testing sensor function. Set ON-TIME to TEST for initial coverage verification.

Wiring Configurations: Single Fixture, Independent Pair, and Dual Master

The PF-4300-BK supports three wiring configurations beyond the basic single-fixture installation. The dual-master configuration in particular is useful for large entry areas or long driveways.

Single Motion Sensing Light

The standard configuration: black to black, white to white, ground to ground at the junction box. The fixture controls only its own lamp load. The sensor activates the fixture's own bulbs.

Two Motion Sensing Lights — Working Independently

Each fixture controls only its own bulbs, but both are wired to the same circuit. Motion at fixture A triggers only fixture A's lights; motion at fixture B triggers only fixture B's lights. Wiring diagram: each fixture connects black-to-black, white-to-white, ground-to-ground at its own junction box, both fed from the same circuit. This is the straightforward "two porch lights on the same switch circuit" installation.

Dual Master System (Advanced)

The most capable configuration: either fixture detecting motion triggers both fixtures simultaneously. The manual states: "It is also possible to wire two motion sensing lights so that either fixture will turn on both lights at the same time (dual master system)." This is useful for: large entryways where coverage from one sensor position is insufficient; long driveways where a motion event at the bottom triggers light at the top of the driveway simultaneously; front/back porch configurations where motion at either entrance activates all exterior lighting.

⚠ Dual Master Requires Electrical Wiring Experience The manual explicitly states: "It is recommended that only people with electrical wiring experience attempt this configuration." The dual-master wiring involves specific connections between the two fixtures' control circuits, not simply paralleling them. The manual also warns: "If the dual control wiring is not done correctly, it can destroy both motion sensing light fixtures and void your warranty." Before attempting dual-master wiring, the manual recommends calling the technical service line (1-800-858-8501) — though this line is no longer active. For dual-master wiring of current Heath Zenith equivalents, consult the current fixture's manual for step-by-step dual-master wiring diagrams.

Controlling Additional Fixtures from the Sensor

The PF-4300-BK's sensor is rated for up to 200W (1.7A) maximum tungsten — significantly more than the 100W maximum fixture load. The manual notes: "This fixture is provided with a sensor rated for 200 Watts. Since the fixture is only rated 100 Watts, 100 Watts of additional lighting may be controlled by this sensor." This means the sensor circuit can switch an additional 100W of external fixture load (a second standard or motion-sensing porch light, or a flood lamp in the same junction box circuit). When calculating total sensor load: add the fixture's own maximum bulb wattage to any additional controlled fixtures; stay within the 200W sensor maximum.

Sensor Coverage Adjustment, Directional Sensitivity & Seasonal Calibration

PIR (passive infrared) motion sensors on porch lights are more complex than most homeowners realize. Three separate adjustments affect detection behavior, and seasonal temperature changes require periodic recalibration of at least one of them.

The SENS (Sensitivity) Dial

The sensitivity dial adjusts how strong a heat differential the sensor requires to trigger. Set toward MAX, the sensor triggers on smaller heat differentials — catching more distant and slower-moving targets but also more prone to false triggers from passing vehicles, pets, HVAC equipment, or wind-blown sun-heated surfaces. Set toward MIN, the sensor requires a stronger heat contrast to trigger — more resistant to false triggers but also less sensitive to distant or slow movement.

Directional Sensitivity Bias: A Critical Point Many Owners Miss

The sensor is not equally sensitive in all directions within its 360° range. The manual states explicitly: "The sensor is less sensitive to motion directly towards it and more sensitive to motion across coverage area." This means a person walking directly toward the sensor — approaching the porch head-on from the street — may not trigger the light at the full 30-foot range. A person walking across the sensor's field of view — moving parallel to the house front — will trigger it at greater range. This is physics, not a defect. To compensate: aim the sensor so that the path of approach is a crossing path rather than a head-on approach. If the porch faces directly toward the street and the approach path is head-on, reduce sensitivity slightly (to avoid false triggers on crossing traffic) and accept that close-range (10–15 feet) head-on detection will work reliably even if 30-foot head-on detection doesn't.

Seasonal Temperature Calibration — Required Annual Maintenance

This is the most important and least-known maintenance requirement for PIR motion sensors: the sensitivity dial setting that works well in December won't work well in July, and vice versa. The official manual states: "Seasonal Temperature Changes — The closer the surrounding temperature is to a person's body heat, the less sensitive the sensor will appear. The greater the temperature difference, the more sensitive the sensor will appear. The SENS control might need to be readjusted toward MIN or MAX as the outside temperature changes for the different seasons. This is a normal part of the light sensor's operation."

The Lens Shield: When and How to Use It

The lens shield is one of the most useful — and most overlooked — accessories included with the PF-4300-BK. Many owners discard it with the packaging without realizing it solves specific, common problems.

What the Lens Shield Does

The lens shield is a physical cover that installs over the PIR sensor lens to block detection from specific directions. By partially covering the sensor, it narrows the field of view, preventing the sensor from detecting heat sources in areas you don't want it to monitor.

When to Install the Lens Shield

The official manual identifies two primary scenarios: "If you suspect that a heat source of this type is falsely triggering the sensor and reducing the sensitivity does not solve the problem, then a lens shield (included) can be installed." Common false-trigger heat sources that the manual lists include: dryer exhaust vents, air conditioning units, direct sun heating dark surfaces (dark asphalt, black cars), and other motion-generating heat sources like large animals. If reducing the SENS dial doesn't stop false triggers from a specific direction, the lens shield physically blocks detection from that direction rather than reducing overall sensitivity.

Specific Lens Shield Installation Scenarios

✓ TEST Mode + Lens Shield = Precise Coverage Tuning The most effective way to aim the lens shield is: set ON-TIME to TEST (5-second activation), install the lens shield, then walk through the coverage area to identify which zones still trigger and which are now blocked. Adjust the lens shield position until only the intended detection zones remain active. Then switch back to your normal ON-TIME setting (1, 5, or 10 minutes) once coverage is correct.

Complete Troubleshooting Guide — All Symptoms from the Official Manual

This table reproduces the complete troubleshooting guide from the PF-4300-BK owner's manual, with all documented symptoms, possible causes, and solutions. Check the 1½-minute calibration wait before beginning any troubleshooting sequence.

SymptomPossible CauseSolution Light will not come on Wall switch is off Turn wall switch on Light will not come on Bulbs loose or burned out Check and reseat or replace bulbs; confirm correct base type (E12 candelabra) Light will not come on Fuse blown or circuit breaker tripped Reset breaker or replace fuse; if it trips again, a wiring fault is present — call an electrician Light will not come on Daylight shutoff is active (photocell sensing daylight) The light will not activate in AUTO mode during daylight hours — this is normal operation; wait for dusk or switch to MANUAL mode for daytime testing Light will not come on Sensor circuitry is in calibration period Wait 1½ minutes after power-on for the circuitry to calibrate before testing Light will not come on SENS (sensitivity) set too low Rotate SENS dial toward MAX; also consider seasonal adjustment (winter = lower sensitivity needed; summer = higher) Light will not come on Approaching sensor head-on (not across coverage area) Walk across the sensor's field of view rather than directly toward it; this is the sensor's least-sensitive direction by design Light turns on by itself / false triggers DualBrite switch active (3H, 6H, or D setting) The accent half-power mode is operating as designed; if unwanted, slide DualBrite switch to Off position Light turns on by itself / false triggers Sensitivity set too high Rotate SENS dial toward MIN; also consider seasonal adjustment (summer = higher sensitivity setting needed) Light turns on by itself / false triggers External heat source near sensor (HVAC, dryer vent, dark surface heated by sun) Reduce sensitivity first; if problem persists, install the lens shield to block detection from the direction of the heat source Light turns on by itself / false triggers Light control in MANUAL mode Switch to AUTO: flip wall switch off for one minute, then back on; fixture will reset to AUTO after calibration period Light stays on continuously DualBrite switch set to D (dusk-to-dawn) This is normal DualBrite operation — set DualBrite switch to Off if continuous half-power is not desired Light stays on continuously Light control in MANUAL mode Flip wall switch off for one minute, back on to reset to AUTO Light stays on continuously Repeated motion is being detected Check for moving heat sources in range; consider reducing SENS or installing lens shield Light flashes or flickers Control in TEST mode warming up Normal during first 1½-minute calibration period; also normal in TEST mode during initial cycling Light flashes or flickers Sensitivity set too high with multiple heat sources Reduce sensitivity; install lens shield if a specific heat source direction is causing the issue Light comes on during the day Fixture is in MANUAL mode MANUAL mode bypasses the photocell; reset to AUTO (power off one minute, back on) Light does not stay on long enough ON-TIME switch set to TEST Move ON-TIME switch from TEST to 1, 5, or 10 minutes Light does not stay on long enough ON-TIME set to 1 minute Move ON-TIME switch to 5 or 10 minutes for longer on-time

Troubleshooting table derived from Portfolio Motion Sensing Porch Light PF-4300-BK Owner's Manual (ManualsLib 67284) and supplementary DualBrite motion sensing ceiling light manual (Lowes PDF, item 016963430044). Scroll right on mobile.

Preserve usable Portfolio components during an upgrade

For Portfolio PF-4300-BK Motion Sensing Porch Light: Manual, Specs, DualBrite & Troubleshooting, use the page’s specific product or problem as the starting point rather than a generic Portfolio Lighting rule. Preserve the exact model or item number when available, document the failed component or symptom, and record the dimensions, ratings, mounting details, and connections that control the repair decision. That evidence makes it possible to distinguish identification, diagnosis, parts matching, and complete replacement instead of treating them as the same task. Continue with Portfolio Parts once the problem has been narrowed.

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LED Retrofit: Replacing the Original Candelabra Incandescent Bulbs

The PF-4300-BK was designed for candelabra base incandescent bulbs at 25W maximum per socket. LED replacements in the same base format reduce energy use significantly and eliminate the frequent bulb replacement that incandescent bulbs require in outdoor conditions.

The Correct Bulb Spec

DualBrite and LED Dimming Compatibility

The DualBrite half-power accent feature reduces the voltage to the lamps to achieve half-power output. Traditional incandescent bulbs dim smoothly at lower voltages. Many LED bulbs, however, behave unpredictably at reduced voltage — they may flicker, buzz, not light at all, or light inconsistently at the half-power DualBrite voltage level. If you plan to use DualBrite accent mode, test LED bulbs carefully at the DualBrite setting before committing to them. Look specifically for LED candelabra bulbs marked as "dimmable" — these are far more likely to handle the voltage reduction smoothly than non-dimmable LED bulbs. See the Portfolio bulb replacement guide for the broader framework on LED compatibility with older Portfolio fixtures.

Light Output Comparison

Bulb TypeWattage (each)Est. LumensExpected LifeDualBrite Compatible? Original: Incandescent Type B E1225W220 lm1,000–2,000 hrsYes — dims smoothly LED Type B E12 Dimmable4–5W300–400 lm15,000–25,000 hrsGenerally yes — verify LED Type B E12 Non-Dimmable4–5W~300–400 lm15,000–25,000 hrsLikely no — may flicker

Current Replacement Fixtures for the Discontinued PF-4300-BK

The Portfolio PF-4300-BK has been discontinued along with the entire Portfolio lighting brand. If the fixture housing is damaged beyond repair, or if you simply want a current-production equivalent, here's what to look for.

What Made the PF-4300-BK Distinctive

The PF-4300-BK's defining features were: diecast metal construction (more durable than plastic), DualBrite two-level operation, 360° sensing, and a traditional porch-lantern form factor. Most modern replacements offer at least some of these features.

Heath Zenith Equivalents — Same Manufacturer

Since the PF-4300-BK was manufactured by HeathCo LLC (Heath Zenith), the closest current equivalents are Heath Zenith motion-sensing porch lights in the SL-4000 and SL-4300 series sold through hardware and home improvement stores. These use the same underlying sensor technology and DualBrite system. The SL-4300 series is the Heath Zenith retail equivalent of the PF-4300-BK portfolio fixture. See the Portfolio lighting alternatives guide for current side-by-side comparisons with confirmed specs.

What to Specify When Searching for a Replacement

For a complete current-product comparison including Defiant, Regent, and other current Lowe's and Home Depot porch light motion sensors, see the Portfolio replacement guide and the discontinued Portfolio lighting resource.

Related Portfolio Lighting Guides

Portfolio PF-4300-BK FAQ

What bulb does the Portfolio PF-4300-BK use?

The PF-4300-BK uses a Candelabra Base, Type B bulb, 25 Watt Maximum per socket. E12 screw base; Type B (bullet or flame-tip shape). Total fixture maximum is 100W across both sockets. LED replacement: a 4–5W dimmable Type B E12 candelabra LED, which produces equivalent or better light output at a fraction of the wattage. Use dimmable LEDs if you plan to use the DualBrite half-power accent feature. See the Portfolio bulb replacement guide for full LED compatibility details.

Why does my Portfolio PF-4300-BK turn on by itself or stay on during the day?

The most likely cause is the DualBrite accent mode being active — check the DualBrite switch position on the sensor head. If set to 3H, 6H, or D, the light runs at half power during those periods by design. If it's triggering at full power unexpectedly, check: sensitivity set too high (rotate SENS toward MIN); a nearby heat source like a dryer vent or HVAC unit; fixture stuck in MANUAL mode (flip wall switch off for one full minute, then back on to reset to AUTO). If DualBrite is set to D (dusk-to-dawn), the half-power light running all night is not a malfunction — it is the fixture operating exactly as the D setting specifies.

How do I switch the PF-4300-BK from AUTO to MANUAL mode?

Flip the wall switch OFF for one second, then back ON. This toggles the fixture between AUTO and MANUAL mode. MANUAL mode only works at night (the photocell returns it to AUTO at dawn) and only when the ON-TIME switch is at 1, 5, or 10 minutes. If you lose track of which mode you're in: turn power off for one full minute, then back on — after the 1½-minute calibration period the fixture returns to AUTO mode automatically.

Where can I get a replacement PF-4300-BK or parts for it?

Portfolio is a discontinued Lowe's exclusive brand. HeathCo LLC's service line (1-800-858-8501) listed in the original manual is no longer operational for Portfolio warranty claims. The fixture housing, sensor module, and lens shield are not available as separate replacement parts through any current distribution channel. For the lens shield specifically — the most commonly needed accessory — universal PIR sensor lens shields and "blinder" accessories for Heath Zenith / HeathCo fixtures are sometimes available through Heath Zenith parts channels since the PF-4300-BK was manufactured by the same company. For a full replacement fixture, see the Heath Zenith SL-4300 series as the closest current equivalent. See the replacement parts guide and discontinued Portfolio lighting guide for the current sourcing framework.

My PF-4300-BK sensor seems less sensitive in summer than in winter. Is it broken?

No — this is documented normal PIR sensor behavior. In summer, ambient temperature is close to body temperature, reducing the heat contrast the sensor detects. In winter, the cold background amplifies the contrast. The official manual explicitly states that the SENS dial must be readjusted seasonally: toward MAX in summer (to compensate for reduced contrast), and toward MIN in winter (to prevent false triggers from the amplified contrast). Recalibrating twice a year at the seasonal transitions is normal maintenance, not a sign of malfunction.

published by PortfolioLighting.net Portfolio Lighting Specialist · Motion Sensor Troubleshooting · 25 Years Field Experience

The seasonal sensitivity calibration note is the one thing nobody reads in the PIR sensor manual and everybody needs. Every summer I get calls from homeowners convinced their porch light sensor has failed — it worked all winter and suddenly it barely detects someone at 10 feet. The answer is always the same: the ambient temperature has risen, the SENS dial needs a turn toward MAX, and the "broken" sensor will work perfectly. Takes 30 seconds to adjust and saves the cost of an unnecessary fixture replacement. The 1½-minute calibration wait catches the other half of the calls.