XPARTCO
EXP497 Microwave Door Switch (Normally Open) WB24X829, 3B73362F, WB24X816
EXP497 Microwave Door Switch (Normally Open) WB24X829, 3B73362F, WB24X816
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XPARTCO EXP497 Microwave Door Switch — Normally Open (NO)
Two-terminal normally-open microwave door interlock switch rated 16A at 125/250VAC.
Product Overview
The XPARTCO EXP497 is a quality aftermarket Normally Open (NO) microwave door interlock switch. It is used in compatible microwave door-latch circuits to help the appliance detect correct door position before operation.
This switch is rated 16A at 125/250VAC and uses a compact two-terminal microswitch format commonly found in countertop, over-the-range, and built-in microwave ovens.
Quick Answer
EXP497 = Normally Open (NO), 2-terminal, 16A 125/250VAC. Confirm the original switch is also a Normally Open type and verify terminal size, actuator position, mounting dimensions, and appliance model before ordering. Do not substitute it for a Normally Closed (NC) switch.
Common Problems This Part May Fix
- Microwave will not start when the door is closed
- Intermittent start or stop condition
- Microwave stops when the door latch moves
- Door switch fails continuity test when actuated
- Switch actuator is cracked, stuck, or no longer clicks correctly
- Door-interlock fault caused by a failed NO switch
Replaces and Cross-References
Cross-reference numbers are for identification. Confirm the original switch is Normally Open and matches the mechanical layout before installation.
Compatibility
Used in many compatible microwave ovens from GE, Whirlpool, LG, Samsung, Frigidaire, Kenmore, Panasonic, Sharp, and related brands where the original door-interlock switch is a Normally Open, two-terminal microswitch with matching electrical and mechanical specifications.
Important: Microwave door systems often use more than one switch, and the switches can look nearly identical while having different contact states. Verify NO vs. NC, terminal orientation, actuator position, mounting-hole spacing, and the full appliance model number before ordering.
Key Features
- Quality XPARTCO aftermarket replacement
- Normally Open (NO) contact configuration
- Two-terminal microswitch
- 16A at 125/250VAC
- Approx. 0.187 in. / 4.8 mm quick-connect terminals
- Compact microwave door-interlock format
- Suitable for compatible primary/secondary interlock positions that specify NO operation
Product Specifications
| Part Number | EXP497 |
| Brand | XPARTCO |
| Part Type | Microwave Door Interlock Microswitch |
| Contact Type | Normally Open (NO) |
| Terminals | 2 |
| Electrical Rating | 16A, 125/250VAC |
| Terminal Width | Approx. 4.8 mm / 0.187 in. |
| Approx. Switch Size | 27.8 × 10.3 × 15.9 mm |
| Approx. Mounting Spacing | 22.2 × 10.3 mm |
| Condition | New |
| Quality | Aftermarket Replacement |
| Quantity | 1 Switch |
Microwave Safety & Installation Notes
Microwave ovens contain high-voltage components that can retain a dangerous or potentially lethal electrical charge even after the appliance is unplugged. Door-interlock switches are also part of the microwave's safety system.
- Disconnect power before service.
- Do not service the high-voltage section unless properly trained and equipped.
- Confirm the replacement switch is the correct NO type before connecting wires.
- Inspect the door latch, switch holder, actuator, and mounting tabs for damage or misalignment.
- After repair, verify all door-interlock switches operate in the correct sequence.
- Perform manufacturer-required interlock, leakage, and shielding checks before returning the microwave to service.
Professional microwave service is strongly recommended. Never bypass, tape, jumper, or defeat a microwave door-interlock switch.
Frequently Asked Questions
What does Normally Open mean?
At rest, the switch contacts are open. When the switch actuator is pressed by the microwave door-latch mechanism, the contacts close. The exact role depends on the appliance's interlock design.
Can EXP497 replace a Normally Closed switch?
No. A Normally Open switch and a Normally Closed switch perform different electrical functions and are not interchangeable just because they look alike.
Is EXP497 a Genuine OEM switch?
No. EXP497 is a quality XPARTCO aftermarket replacement switch.
Why does my microwave use several door switches?
Many microwaves use primary, secondary, and monitor/interlock switches together as a safety system. Each position can require a different switch type.
Shop With Confidence
Verify your original switch number, NO contact state, terminal layout, actuator position, mounting dimensions, and complete microwave model before ordering.
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