GE Combination wall oven and microwave Error Code F91: Meaning & How to Fix It

By the ErrorCodePro Editorial Team · Last reviewed October 20, 2026

GE combination wall oven and microwave error code F91 means: Oven door detected un-locked during self-clean and steam clean. [1] Keep using it? Only if the owner checks below clear the code; if it returns, stop and book a repair. Start with the owner checks below, beginning with: write down the code and model number.

Source: GE combination wall oven and microwave error-code chart, via Sears PartsDirect [1].

Quick facts

Code	F91
Also shown as	None listed by the manufacturer
Brand / appliance	GE combination wall oven and microwave
System	Door / lock
Meaning (service chart)	Oven door detected un-locked during self-clean and steam clean. [1]
Keep using it?	Only if the owner checks below clear the code; if it returns, stop and book a repair
DIY-safe?	Owner checks only (listed below)
Support	GE Appliances support (products.geappliances.com)
Source document	GE combination wall oven and microwave error-code chart (via Sears PartsDirect)

On this page: Meaning · Steps · Parts · When to call a technician · Related codes · FAQ

What error code F91 means on a GE combination wall oven and microwave

Oven door detected un-locked during self-clean and steam clean. [1]

This is a door / lock code. Codes and wording can vary by model, so check your owner's manual for your model number.

How to fix GE combination wall oven and microwave error code F91 (safe owner checks)

Safety first: disconnect power before you remove any panel or reach into the sump or drum. Do not touch wiring, the control board or the motor. If you see water near electrical parts, stop and call a technician. These steps are based on the GE combination wall oven and microwave error-code chart (via Sears PartsDirect) [1], rewritten for clarity.

Write down the code and model number. Note exactly what the display shows (F91) and copy the full model number from the rating label, so you can confirm this chart applies to your combination wall oven and microwave and order the right parts.
Close the door or lid fully. Don't attempt to open the oven door when the oven is still hot during a cleaning cycle.
Do a power reset. Unplug the appliance or switch off its breaker for one minute, then restore power and try again. If the code clears and stays away, it may have been a one-off fault.
Test and decide. Run a short cycle or restart and watch the display. If F91 comes back after these checks, stop using the range for this function and call a technician, because the remaining causes need meters or part replacement.

The first and last steps (and the power reset) are general owner checks added by ErrorCodePro; the rest follow the GE combination wall oven and microwave error-code chart published by Sears PartsDirect, rewritten for safe owner use.

Parts that may be involved

Exact parts depend on your model number. This page lists part types only, never part numbers.

Door lock
Electronic oven control board
Wire harness

When to call a technician

Once the oven cools, disconnect electrical power and check the wire harness between the door lock and the electronic oven control board.
Reconnect any loose wires or replace the wire harness if damaged.
If the wire connections are okay, a technician should replace the door lock.
If the problem continues, a technician should replace the electronic oven control board.
Anything involving wiring, the control board, the motor or the water valve electrics
The appliance is under warranty: contact GE Appliances support (products.geappliances.com) first

Frequently asked questions

What does error code F91 mean on a GE combination wall oven and microwave?

The GE combination wall oven and microwave error-code chart lists F91 as follows: Oven door detected un-locked during self-clean and steam clean.

Is it safe to keep using the combination wall oven and microwave with F91?

Only if the owner checks below clear the code; if it returns, stop and book a repair.

Can I fix GE combination wall oven and microwave error F91 myself?

Only with the owner checks on this page, starting with: write down the code and model number. If it persists, call a technician or GE Appliances support (products.geappliances.com).

Sources

Sears PartsDirect: GE combination wall oven and microwave error-code chart (third-party copy of manufacturer service data)

Last reviewed: October 20, 2026. ErrorCodePro is not affiliated with GE.