Dryer Door Switch WP3406107 Replacement – What Part Fixes This Problem?
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Understanding the Problem
Brief explanation: The WP3406107 (also cross-referenced as AP3132865, 528948, PS346704) is a dryer door switch — a small mechanical/electrical switch that tells the dryer the door is closed so the motor, heater, and lights can operate. When this switch fails the dryer may not start, will stop mid-cycle, or the drum light may not turn on. Diagnostic and repair steps: 1) Confirm symptoms: - Try closing the door and pressing the door latch/plunger — listen for a distinct click. If no click or intermittent click, suspect the switch. 2) Safety first: - Unplug the dryer or switch off the breaker. Do not work on a powered appliance. 3) Access the door switch: - On most front-load/common household dryers the switch is behind the front panel or inside the door opening (some models require removing the top panel or control panel). Remove screws or clips holding the top/front. Keep track of screws. 4) Inspect visually: - Locate the white or black plastic switch with 2–3 spade terminals and a plunger/actuator. Check for broken actuator, melted housing, or burnt terminals and frayed wires. 5) Test the switch (no power): - Disconnect the wiring harness from the switch. Set a multimeter to continuity or ohms. Press the plunger and watch for continuity change. Typical normally-closed or normally-open behaviour depends on model — the switch should change state when pressed. No continuity change = bad switch. 6) Replace the switch: - Remove retaining screws or clips holding the switch. Pull it out, and note wire locations or take a phone picture. Transfer wires to the identical terminals on the new switch (match colors/positions). Install the new switch and secure it. 7) Reassemble and test: - Reinstall panels, restore power, and test dryer operation: close the door and start a cycle. Verify dryer starts, runs, and the drum light (if present) operates normally. 8) If problem persists: - Check wiring harness for breaks, the door strike/actuator for alignment damage, and control board / timer for faults. A shorted harness or a failing control can mimic a bad switch. How to fix (practical): - Buy the correct replacement: WP3406107 is a direct replacement; AP3132865, 528948 and PS346704 are common cross-reference numbers. Order an exact match for your model. - Tools: screwdriver set (Phillips/flat), nut driver (1/4" or 5/16"), multimeter, needle-nose pliers. - Time: 15–45 minutes depending on model access. Safety note: Always disconnect power before testing or replacing the switch. If you smell burned plastic, allow the appliance to cool and consider replacing any damaged wiring or contacting a technician. If you are not comfortable with electrical testing, hire a qualified appliance technician.
Common Symptoms
Dryer won't start or stops when door is closed, intermittent starting, no drum light, or dryer runs only when the door is held firmly closed.
Common Causes
- Failed door switch (worn contacts or broken plunger)
- Broken or misaligned door latch/actuator so switch isn't depressed
- Damaged wiring or harness to the switch (burnt/melted connectors)
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
If pressing the door plunger produces no audible click and the multimeter shows no continuity change when the plunger is toggled, the door switch (WP3406107 / AP3132865 / 528948 / PS346704) is almost certainly bad.
Frequently Asked Questions
Can I run the dryer with a broken door switch?
No — most dryers are designed not to run when the door switch is open for safety. A broken switch will typically prevent the dryer from starting or cause it to stop. Bypassing the switch is unsafe and not recommended.
How do I test the door switch with a multimeter?
Unplug the dryer, disconnect the switch connector, set the multimeter to continuity/ohms, and press the switch plunger. You should see the meter change state (continuity appear/disappear) when the plunger is pressed. No change indicates a failed switch.
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