EXP499 Microwave Door Switch (Normally Closed)
- Sku:
- EXP499
- Vendor:
- XPARTCO
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EXP499 Microwave Door Switch (Normally Closed)
EXP499 Microwave Door Switch (Normally Closed)
The EXP499 is a universal replacement normally closed (NC) door interlock switch for microwave ovens and microwave/oven combination units. This is a critical safety component: microwave door interlock switches exist specifically to cut power to the magnetron the instant the door opens, preventing any possibility of microwave radiation escaping the cavity while the door isn't fully closed and latched. This switch's normally closed contact design matches a wide range of microwave door latch mechanisms across GE, Whirlpool, Samsung, LG, Kenmore, and other brands.
Rated 16A, 125/250VAC. Over time, this switch's contacts can wear, pit, or fuse together from repeated cycling and the electrical load carried every time the door opens and closes. A failing interlock switch typically shows up as a microwave that won't start at all, a display that works but the unit won't heat, or intermittent operation tied to the door latch area. This is the normally closed counterpart to our EXP497 (normally open) and EXP480 (combined NC/NO) listings — always confirm which specific contact configuration your microwave's failed switch uses before ordering.
Quick Answer
The EXP499 Microwave Door Switch (Normally Closed) fixes microwave ovens and microwave/oven combos that won't start, won't heat, or operate intermittently near the door latch area. 16A, 125/250VAC, normally closed (NC) contact design. Never operate a microwave with a bypassed, disconnected, or suspected-faulty door interlock switch — these switches exist to prevent radiation exposure and must always be replaced with a properly rated part, never removed or defeated.
Common Problems This Part Fixes
- Microwave won't start at all, even though the display and buttons respond normally
- Microwave display and timer work, but the unit won't heat
- Microwave stops working intermittently, especially around the door latch
- Clicking or buzzing sound from the door area without the microwave starting
- Breaker tripping when the door is opened, indicating a switch contact that has fused shut
- Door that doesn't feel like it's latching securely
Cross Reference Information
Part numbers can change over a product's lifecycle as manufacturers update designs or release new appliance models. For your convenience, we've included any known superseded, alternate, or cross-reference part numbers that match this item.
Replaces Part Numbers
This microwave door switch directly replaces the following OEM and cross-reference part numbers:
WB24X830, AH237422, EA237422, WB24X0800, WB24X0830, WB24X10075, WB24X800, AP2024338, PS237422, WB24X25397, WB24X817, WB24X10112, WB24X0817, AP6037282, PS11766871, 00606695, 1386420, 606695, AH3477007, EA3477007, AP4067354, PS3477007, PS8726632, 5304408937, 5304509459, 5304464098, 4583655, AP6230614, PS12071302, ANE61784L0AG, AP7040623, WB24X10205, WB24X10147, 251201600930, 3025959, AP5790849, PS8754455, W10269458, W10211973, 1550016, 4393598, 8206347, AH2361111, EA2361111, AP4429884, PS2361111, 6600W1K001C, AP4650823, PS3529293, WB24X824, 253814, WB24X0824, AH237416, EA237416, AP2024332, PS237416, 5304456101, 1198245, 75304456101, AH1532505, EA1532505, AP3960662, PS1532505, 6600W1K001R, 1583495, AH3598700, EA3598700, AP5254801, PS3598700, 3405-001033, DE34-20019A, WP3405-001033, 2028596, 3405-000176, AP4044665, PS4131191, WB24X804 253795, WB24X0422, WB24X0804, WB24X422, AH237397, EA237397, AP2024313, PS237397, WB24X10189, 1810588, AH3486597, EA3486597, AP4980349, PS3486597, 3B73361E, 1325767, 3B73361D, 6600W1K003C, 6600W1K004B, AH3522736, EA3522736, AP4629337, PS3522736, 4415A66600, 1206671, 4415A66610, GSM-V1602A2, AP5322919
If your part number is not listed above, contact our support team before ordering and we will verify compatibility.
Compatibility
This door switch is a universal replacement compatible with convection microwave ovens, grill microwave ovens, microwave/oven combination units, and solo microwave ovens across many brands including GE, Whirlpool, Samsung, LG, and Kenmore, wherever the original switch matches this normally closed (NC) contact configuration and electrical rating.
Note: Microwave door interlock systems typically use two or three separate switches working together (primary interlock, monitor/secondary switch, and sometimes a third safety switch), and not all of them share this same normally closed (NC) configuration. This is a different part from our EXP497 (normally open) and EXP480 (combined NC/NO) listings. Confirm which specific switch position has failed on your microwave, and match the contact configuration and electrical rating exactly — never substitute a switch with a different configuration. Always verify your full model number before ordering. Contact our support team with your model number if you're unsure which switch your microwave needs.
Key Features
- Universal replacement microwave door interlock switch — normally closed (NC) contact design
- Resolves "won't start," "won't heat," and "intermittent operation near the door latch" symptoms caused by switch failure
- Rated 16A, 125/250VAC
- Suitable for convection, grill, combination, and solo microwave ovens
- Direct drop-in replacement matching the original mounting and terminal configuration
- Replaces a wide range of OEM part numbers across GE, Whirlpool, Samsung, LG, and Kenmore platforms — see full list above
- Built to OEM-equivalent quality standards
Product Specifications
| Part Number | EXP499 |
| Part Type | Microwave Door Interlock Switch (Normally Closed) |
| Condition | New — Universal Replacement Part |
| Contact Configuration | Normally Closed (NC) |
| Max. Current | 16A |
| Max. Voltage | 125/250VAC |
| Terminal Size | 4.7mm |
| Application | Convection, Grill, Combination, and Solo Microwave Ovens |
| Related Parts | EXP497 (normally open) |
| Quantity | 1 door interlock switch |
Installation Notes
Frequently Asked Questions
My microwave stopped working. How do I know if it's actually a door switch and not something else?
A common pattern is a microwave where the display and buttons respond normally, but pressing start does nothing, or the unit hums without heating — this points toward the door interlock circuit rather than the control board. Since these switches also serve a critical safety function, if you suspect a fault in this area, it's best to have it properly diagnosed and replaced rather than working around the symptom.
Is it safe to just disconnect a faulty interlock switch so the microwave will run?
No — this is not safe under any circumstances. Door interlock switches exist specifically to cut power to the magnetron the instant the door opens, preventing microwave radiation from escaping. Bypassing, disconnecting, or jumpering one of these switches removes that protection and can expose you and anyone nearby to microwave radiation, even if the microwave otherwise appears to run normally. Always replace a faulty switch with a correctly rated new one rather than working around it.
How is this different from your EXP497 and EXP480 listings?
These are different contact configurations for different switch positions in a microwave's door interlock system. This EXP499 is normally closed (NC) only. Our EXP497 listing is normally open (NO) only, and our EXP480 listing combines both NC and NO contacts in a single switch body. Since most microwaves use two or three interlock switches with different configurations, check which contact type your specific failed switch uses before ordering.
My microwave trips the breaker whenever I open the door. What does that mean?
This can indicate that one of the door switches has fused or welded its contacts shut from repeated electrical stress, so it continues carrying current when it shouldn't. This is a genuine safety concern and the affected switch should be replaced promptly rather than continuing to use the microwave.
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