Whirlpool Microwave Error Codes

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📋 Error Code Index — Whirlpool Microwave

F1Control Board Failure F2Shorted Key F3Temperature Sensor Open F4Temperature Sensor Short F7Door Switch Fault

Control Board Failure

Main control board detected an internal fault.

High Priority

Possible Causes
Control board component failure
Power surge damage
Diagnostic Steps
1Disconnect power 60 seconds and retry
2Inspect board for burn marks
3Replace main control board if fault persists

Shorted Key

A key on the membrane panel is continuously activated.

Medium Priority

Possible Causes
Moisture on keypad causing false activation
Physical damage to membrane keypad
Diagnostic Steps
1Dry keypad area with clean cloth
2Press Cancel to reset
3Disconnect power 60 seconds
4Replace control panel if fault persists

Temperature Sensor Open

Oven cavity temperature sensor open circuit.

Medium Priority

Possible Causes
Sensor failed open
Connector loose or corroded
Diagnostic Steps
1Check sensor connector
2Test sensor resistance — OL confirms open
3Replace sensor if open confirmed

Temperature Sensor Short

Oven cavity temperature sensor shorted.

Urgent

Possible Causes
Sensor failed shorted
Wiring touching cavity metal
Diagnostic Steps
1Test sensor — near 0Ω confirms short
2Inspect wiring
3Replace sensor immediately

Door Switch Fault

Door switch not confirming closed — microwave will not start.

Medium Priority

Possible Causes
Door not fully closed
Primary or secondary switch failed
Wiring to switches open
Diagnostic Steps
1Push door firmly closed
2Test primary and secondary switches for continuity
3Replace any switch open when door is closed

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Important Notice: Error code information on this page is based on Whirlpool manufacturer service documentation. Microwave ovens contain a high-voltage capacitor that retains a lethal charge even when unplugged. Internal service should only be performed by a qualified technician. AppliancesCare Appliance Repair LLC provides this information for educational purposes only.