Microwave Door Interlock Switch SPDT 21A For: Universal 28QBP0491

Microwave Door Interlock Switch SPDT 21A For: Universal 28QBP0491

Safety first: Disconnect electrical power before servicing. Microwave ovens can retain dangerous high voltage after unplugging. Internal microwave repairs and door-interlock testing should be performed by a qualified service technician. Never bypass or defeat a door interlock.

Restore the microwave door-sensing circuit with this ERP replacement SPDT door interlock switch for compatible microwave ovens. The switch has normally open and normally closed contacts, is rated 21 amps at 125/250 volts, and uses 3/16-inch terminals. A failed or worn switch can prevent starting, cause intermittent operation, or stop the control from correctly sensing the door position. Verify the complete appliance model, original part, terminal layout, ratings, and mounting fit before ordering. Universal is a catalog label only and does not mean the switch fits every microwave.

Product Details

• SKU: 28QBP0491
• UPC: 793713639659
• Country of origin: Not specified in current product data
• Switch type: SPDT with normally open and normally closed contacts
• Electrical rating: 21A at 125/250V
• Terminals: 3/16-inch

Compatible Part Numbers

• 28QBP0491

Key Features

• Direct replacement: Replaces the listed 28QBP0491 microwave door interlock switch reference where specifications match.
• Door sensing: Helps the microwave control detect the required door position.
• Known configuration: SPDT switch with normally open and normally closed contacts.
• Fitment check: Match the switch type, terminal layout, electrical rating, and original part before installation.

Fixes These Symptoms

• Microwave will not operate with the door closed after proper diagnosis
• Microwave stops or operates intermittently when the door position changes
• Microwave door interlock switch fails continuity testing
• Switch is physically damaged or terminals are worn

Compatible Brands

Universal catalog label only; verify the exact appliance fitment before ordering.

Compatible Models

Fits various models. Please verify compatibility with us before ordering

Installation Instructions

1. Disconnect the microwave from electrical power and follow the model-specific service manual.
2. Have a qualified technician verify the switch failure and diagnose the door-interlock circuit.
3. Confirm the complete microwave model, switch type, terminal layout, electrical rating, and original part number.
4. Install and test the replacement switch according to the manufacturer’s service procedure. Never bypass or defeat a door interlock.
5. Complete all required high-voltage, door-alignment, and safety checks before returning the microwave to service.

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Safety Disclosure

Prop 65 Warning: Cancer and Reproductive Harm – www.P65Warnings.ca.gov