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Error code reference

GE Microwave Error Code F6

High cavity temperature detected during microwave oven cooking.

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What the F6 error code actually means

Your GE microwave has detected that the inside of the oven got too hot during cooking and shut itself off as a safety precaution. This can happen because of an actual overheating problem, like blocked vents, or because the temperature sensor that monitors the inside of the oven is faulty and sending incorrect readings. Either way, the microwave needs to be checked before continuing to use it.

Diagnostic procedure

The full F6 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of F6

Ranked by how often they cause this code
  1. 1Faulty cavity temperature sensor
  2. 2Blocked or restricted ventilation
  3. 3Malfunctioning cooling fan
  4. 4Overheating from cooking conditions
  5. 5Failed main control board

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Questions people ask about F6

What does F6 mean on a GE microwave?
The F6 code on a GE microwave means the control board has detected a high temperature inside the cooking cavity and has stopped operation as a safety measure. This can be caused by a genuine overheating condition due to blocked vents or a failed cooling fan, or it can result from a faulty cavity temperature sensor reporting incorrect data. The microwave should be inspected before resuming use to determine which condition is present.
Is it safe to keep using my microwave when the F6 code appears?
No, you should not continue using the microwave until the cause of the F6 error has been identified and resolved. The fault indicates either a real overheating condition or a sensor failure, both of which need to be addressed. Operating the unit in an overheating condition could damage the magnetron, waveguide components, or internal wiring.
How much does it cost to repair an F6 error on a GE microwave?
Repair costs vary depending on the root cause. A cavity temperature sensor typically costs between $15 and $50 for the part, while a cooling fan motor can range from $20 to $70. Control board replacement is the most expensive option, often ranging from $80 to $200 or more for the part alone. Adding professional labor, total repair costs can range from $100 to over $300, so it is worth comparing repair cost against the age and replacement cost of the unit.
Can I fix the F6 error on my GE microwave myself?
Some causes of F6 are DIY-friendly, such as clearing blocked vents or cleaning grease from air passages. However, replacing the cavity temperature sensor, cooling fan motor, or control board involves working near high-voltage components, including the capacitor, which can store a lethal charge even when the unit is unplugged. Unless you are trained in appliance repair and know how to safely discharge the capacitor, internal repairs should be handled by a qualified technician.
Will resetting my GE microwave clear the F6 error?
Unplugging the microwave for a few minutes and plugging it back in may temporarily clear the F6 code, but if the underlying cause is not corrected, the error will return. A reset is useful for ruling out a one-time sensor glitch but is not a permanent fix for a failed sensor, blocked vents, or a faulty cooling fan.

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