GE Microwave F1 / F2: Thermal Sensor Fault

Documentation checkedBy ErrHiveUpdated October 28, 2026

THE SHORT ANSWER

The thermal-sensor circuit has reported a fault.

F1 indicates an open thermal sensor; F2 indicates a short. Both need diagnosis.

First safe check

Stop cooking and record F1 versus F2.

Applies to

GE Appliances US consumer support; codes and controls vary by product family and model.

Before you start

Do not remove microwave covers or touch internal components, even with the power disconnected.

Go to safe checks

WHAT YOU MAY NOTICE

Symptoms to record

Display: F1 / F2.

WORK THROUGH THE BASICS

Safe troubleshooting checks

0 of 2 checked

Use the checkboxes to keep track as you read. Stop at any warning or step that does not match your appliance.

Preserve the distinction
Write F1 or F2 exactly as shown; include when heating stopped.
What to note
The technician has the specific circuit indication.
Request diagnosis
Contact GE for service rather than testing internal sensors.
What to note
The fault can be evaluated safely.

THE DETAILS MATTER

Scope & troubleshooting notes

Owner observations

Record the exact code; leave the microwave cabinet closed.

YOUR NEXT DECISION

When to stop and get help

Contact support if the fault persists.

Record what you see

Keep the full model number, exact displayed code, and your observations together for the next conversation.

Use the right support

Contact the manufacturer or a qualified appliance technician when the guide calls for service.

GE Appliances support

THE EVIDENCE

Sources & verification

Our explanations are editorial summaries of the documentation below. They do not replace the instructions for your exact appliance.

Microwave - Error, Fault or Function Codes
GE Appliances · Manufacturer support · Checked Oct 28, 2026
Meaning and owner guidance — GE Appliances US consumer support; codes and controls vary by product family and model.

ErrHive is an independent information resource, not an authorized representative of GE Appliances. Follow your appliance’s manual. Hazardous repairs belong with qualified professionals. Read our safety policy.