Written by
Marcus Delaney Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeF4
ApplianceSpeed Oven
What F4 indicates
The humidity sensor is open or shorted. GE gives F4 for the 120 Volt Advantium only.
GE’s sequence, step by step
Hit CLEAR/OFF or CANCEL.
Enter the program on the control once more.
Should the fault code return, cut power to the oven for a minute or two.
Switch power back on and set up the cooking function again.
When it does not clear
Disconnecting power can reset the control panel and clear a code, GE notes, though some cases need service. An F4 that outlasts the sequence above falls into that group.
GE speed oven repair in San Francisco
For an F4 that persists, the microwave repair page covers GE speed ovens in San Francisco and across the Bay Area. Call (415) 729-2045 and say it is a 120 Volt Advantium showing F4, along with the steps you went through.
Model compatibility: GE reuses codes across series and model years, so F4 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
F4 indicates an open or shorted humidity sensor on the 120 Volt Advantium.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your GE appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your GE appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
