How to Put a GE Oven Into Diagnostic Mode
Before you begin
Make sure the oven is completely cool before entering diagnostic mode. Do not enter diagnostic mode while any cooking cycle is active. Have a pen and paper ready to record any fault codes displayed.
Diagnostic mode is available on most GE freestanding ranges, slide-in ranges, and wall ovens manufactured from approximately 2010 onwards. The exact button sequence can vary by model generation — if the sequence below doesn't work, check your model's tech sheet (usually found by removing the bottom storage drawer and looking inside the frame).
Entering diagnostic mode
- Ensure the oven is in standby (not mid-cycle) and the display is showing the time or is idle.
- Press and hold Bake + Broil Hi/Lo simultaneously for 5 seconds.
- The display will show "tESt" or a dashed line to indicate diagnostic mode has been entered.
- On models without a Broil Hi/Lo button, try Bake + Self Clean held for 5 seconds.
- On newer GE models with a number pad, press 7, 8, 9 in sequence, then press 1, 2, 3.
Reading fault codes in diagnostic mode
- Once in diagnostic mode, press Start or the + button to cycle through stored fault codes.
- Codes are displayed as F followed by a number (e.g., F2, F3, F7) sometimes followed by a modifier digit.
- Record every code shown before clearing them.
- To clear stored codes, press Clear/Off while in diagnostic mode. This erases the log — always record codes first.
Common GE oven fault codes
- F1 — control board / key input fault
- F2 — over-temperature event
- F3 — temperature sensor open circuit
- F4 — temperature sensor short circuit
- F5 — control board communication issue
- F7 — latch motor feedback issue
Component tests available in diagnostic mode
Depending on your GE model, diagnostic mode may also let you test individual components manually:
- Press 1 — bake element relay test (element should activate briefly)
- Press 2 — broil element relay test
- Press 3 — convection fan test (fan should spin for 5 seconds)
- Press 4 — door lock motor test (latch should cycle)
- Press 5 — display segment test (all display segments light up)
Not all component tests are available on all models. Check if the display responds to each press.
Exiting diagnostic mode
- Press Clear/Off twice to exit diagnostic mode.
- The display should return to showing the time or idle state.
- Alternatively, a power cycle (flip the breaker) will always exit diagnostic mode.
See all GE error code guides or browse other oven error codes.
When to use diagnostic mode vs calling a technician
Diagnostic mode is useful for:
- Confirming which component is at fault before ordering a part
- Verifying a repair was successful by checking no codes are stored
- Giving a technician a head-start on diagnosis to reduce call-out time/cost
If diagnostic mode reveals F2 (over-temperature) or F7 (latch failure during self-clean) and the oven is exhibiting erratic behaviour, call a licensed technician. Gas oven diagnostics in particular should always involve a professional if any gas-supply components are suspected.
Frequently asked questions
Do all GE ovens have diagnostic mode?
Most GE electric ranges and wall ovens from 2010 onwards do. Older models and some gas-only models have limited diagnostic capability — check the tech sheet inside the machine.
I entered diagnostic mode but no fault codes showed — what does that mean?
It means no faults are currently stored. If the oven is behaving oddly, the fault may be intermittent and hasn't met the threshold to log a code — or the issue is mechanical rather than electronic.
Will clearing fault codes fix my oven?
Clearing codes removes the record of past faults — it doesn't fix the underlying problem. If the fault condition persists, the code will return on the next cycle.
Can I brick my oven by entering diagnostic mode?
No. Diagnostic mode is a read-only status and test mode. Exiting correctly (or power cycling) returns the oven to normal operation.