GE Microwave F4 / F5: Humidity Sensor Fault

Documentation checkedBy ErrHiveUpdated October 28, 2026

THE SHORT ANSWER

The humidity-sensing circuit has reported a fault.

F4 indicates an open humidity sensor; F5 indicates a short. Arrange service.

First safe check

Record F4 versus F5 before seeking service.

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: F4 / F5.

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.

Record the code
Note F4 versus F5 and the selected cooking function.
What to note
The service record keeps the circuit distinction.
Contact GE
Arrange qualified assessment of a continuing F-code.
What to note
Internal sensor work remains with service.

THE DETAILS MATTER

Scope & troubleshooting notes

Owner observations

Preserve F4 versus F5 when reporting the fault.

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.