GE Oven & Range F20 Error Code: Meaning, Causes & Fix

GE's official fault list groups F2 and F20 in a single row: 'For an unknown reason, the oven temperature has exceeded a preset threshold.' GE publishes no preset temperature for this code and names no part for it.

F20 is a temperature event, not a sensor verdict. Read GE's wording literally: the control is reporting that the oven temperature went past a preset threshold, and GE itself says the reason is unknown — the list pointedly does not say the sensor failed, and it does not split F20 from F2. The temperature information behind the report comes from the oven sensor working with the electronic control (on TrueTemp models GE describes a platinum-tipped oven sensor that monitors and maintains the oven temperature together with the control), so an F20 leaves two families of explanation open: the oven genuinely overheated, or the control was told it overheated by temperature information that was wrong. An earlier version of this entry described F20 as an extended sensor-circuit code and quoted a room-temperature sensor resistance value; neither the sensor-circuit definition nor any resistance value appears in GE's published list, so both have been removed. Two words of GE's sentence do more work than the rest: 'preset' and 'unknown'. 'Preset' means the threshold is GE's, fixed in the control — it is not the temperature you set, and crossing it is a protection event, not a cooking result. 'Unknown' is GE declining to speculate, and it is worth noticing how unusual that is in this list: for most other rows GE names a part or a circuit in a single sentence. For F2/F20 it names an event and admits the cause is open. Owners therefore meet two kinds of bad information about this code: pages that quote a precise threshold temperature (GE publishes none — not for bake, not for self-clean), and pages that convert F20 straight into 'replace the sensor' (GE reserves that sentence for F3 and F4). This page stays inside GE's sentence and works the event: what was the oven doing, was the heat real, and what does the pattern of return say. That is less satisfying than a part number, and it is also how the code is honestly diagnosed.

What causes the F20 code on a GE oven & range?

A genuine over-temperature event

The cavity really did pass the threshold — the pattern to suspect when the oven felt abnormally hot, food burned far faster than the setting explains, or a heating element could be seen glowing when it should have been cycling off. Self-clean, the hottest cycle an oven runs, is the other classic setting for a genuine threshold crossing.

Temperature information the control could not trust

The control cooks and protects by the sensor's report. A sensor that has drifted or failed, or a degraded connection between sensor and control, can report a temperature the cavity never reached — the control cannot distinguish a lying thermometer from a real overheat, and it sets the same F2/F20 code for both.

A control that kept heating past the set point

If the oven truly overheated with a sensor reporting honestly, the remaining branch is the control itself — a heating output held on past the set temperature. This branch is only reachable once the sensor and its connection are proven, and it is service diagnosis, not a first guess.

A transient control or power event

GE notes that for fault codes generally, shutting off the circuit breaker for a minute or two sometimes clears the code — a code raised by a power disturbance rather than by a real temperature event is the version of F20 that never returns after that reset.

A sensor connection that opens as it heats

The sensor's connector and lead live in the hot zone behind and inside the cavity, and heat-cycled terminals loosen and oxidise over years. Cold, the circuit reads plausibly and the oven starts normally; hot, the connection drifts or opens and the temperature report the control receives stops matching the cavity — the classic F20 that arrives deep into a long bake or during self-clean and is gone again by morning. It impersonates both a failed sensor and a genuine overheat, which is why the timing of the code, not just its presence, belongs in the service notes.

One cavity of a double oven, reported on a shared display

Double ovens and double wall ovens — heavily represented in this code's searches — carry two cavities, two sensors and two heating systems behind one control and one display. An F20 on the shared display does not, in GE's published list, say which cavity crossed the threshold. Note which oven you were using, and whether the other cavity heats normally afterwards: that free observation can save a technician from opening the wrong cavity's diagnosis, and a code that only ever arrives from one cavity has already localised itself.

The first bake after a self-clean

Self-clean is the highest heat the oven ever makes and the stress under which ageing sensors, connections and control outputs finish failing. An F20 whose debut is the first ordinary bake after a clean cycle is usually read backwards by owners ('the clean broke it, then it healed') — the more useful reading is that the clean exposed a marginal member of the temperature chain, and the code will be back at the next high-heat demand.

Checks to run before you replace anything

1. Breaker first, once: GE advises turning the range or wall oven off at the circuit breaker until it is serviced, and notes that shutting the breaker or fuse off for a minute or two will sometimes clear a fault code. An F20 that returns on the next heating attempt is not cleared — it is confirmed.
2. Reconstruct the event before you reset anything: which cavity (on a double oven), which function (bake, broil, self-clean), the set temperature, and how far into the cycle F20 appeared. That context is the main evidence separating a genuine overheat from a false report, and it is what a technician will ask for.
3. Judge real versus reported heat from what you observed: food scorched or a cavity that felt fiercely hot points at a genuine event; a normal-feeling oven and normally cooked food under an F20 points at the temperature information. Do not run a high-heat cycle 'to see what happens' — an oven that may have overheated once is not a test instrument.
4. Look at the sensor probe inside the cavity: a probe visibly damaged, hanging loose, or touching the cavity wall is evidence. A clean-looking probe proves nothing either way, and GE publishes no owner resistance value for this sensor in the sources for this page — do not judge it against an ohms figure copied from a non-GE page; a technician tests against the model's own service information.
5. Photograph the display before touching the breaker: F20 versus F2 is worth recording exactly (they share GE's row, but the display your control uses is model information), and a cleared code takes its evidence with it.
6. Write the five facts while they are fresh: cavity, function, set temperature, minutes into the cycle when F20 appeared, and whether the food and cavity matched the set temperature. Genuine overheats and false reports separate on exactly these facts, and no meter reading taken later replaces them.
7. If the element could be seen during the event, note whether it was glowing continuously or cycling: an element held on without cycling is the genuine-overheat signature; an element cycling normally under an F20 is a report the control received, not a heat the cavity made.
8. Do not use the oven's temperature adjustment to 'correct' an F20. Calibration offsets exist on GE ovens for small, consistent differences between set and measured temperature on a healthy oven; an F20 is a threshold fault, not a calibration error, and adjusting around it disguises a protection event instead of diagnosing it.

How to fix the F20 error code

1. If the oven genuinely overheated — element visibly held on, runaway heat — leave the breaker off and book service. A runaway heating fault is the one member of this code family that is a fire risk, and it is not a reset-and-watch case.
2. If F20 cleared with GE's breaker reset and stays away through several ordinary cooking cycles, treat it as the transient case GE describes and monitor; no part is indicated by a code that does not repeat.
3. If F20 returns, the fix is service diagnosis in GE's order of systems: the temperature sensor and its connection first (the control's only source of temperature information), then the control itself. GE's framing for all its fault codes is that a trained service technician should diagnose and correct the issue.
4. Do not order a sensor — or a control board — off the F20 code alone: GE names a part for the neighbouring codes (the sensor for F3/F4, the electronic control for F5/F8/FF) and deliberately names none for F2/F20, because the threshold report does not say which side of it failed.
5. Sequence the repair by proof, not by price: the temperature-reporting chain (sensor, its connection, its harness) is examined first because it is the control's only thermometer; the control's heating output is condemned only when the reporting chain is proven and the oven demonstrably overheated. Reversing that order buys the most expensive part for the commonest fault.
6. Prove the repair the way the fault appeared: if F20 debuted in a long bake, a five-minute preheat proves nothing — the confirmation is an ordinary bake, at an ordinary temperature, run to completion with the code staying away, ideally repeated on the cycle type that originally raised it (short of self-clean, which should not be re-run as a test on an oven that has just reported a threshold fault).
7. Keep the event log with the appliance paperwork. An F20 that was transient once is a note; the same code returning a season later with the same timing is a pattern, and the dated log converts a technician's guess into a directed test.
8. If the reporting chain is renewed and F20 still returns on the first long bake, do not let the diagnosis restart from zero: the sensor and its connection have now been proven with new parts, which moves the evidence onto the genuine-overheat branch — the control's heating output holding an element on past the setpoint. The observations you recorded at the first event (element glowing without cycling, food cooking far faster than the set temperature explains) are what justify that second, larger repair, and they are why this page asks for them before anything is cleared. Parts replaced in sequence are only wasted money when their results go unrecorded; logged, each one eliminates a branch, and an F20 diagnosis that eliminates branches is converging, however unwelcome the remaining branch is.

The part that usually fails: No part is named by GE for F2/F20

GE's list assigns parts to other rows — sensor for F3/F4, electronic control for F5/F8/FF, keypanel for F0/F1/F6/F7 — and assigns none here. The part, if any, follows the diagnosis (sensor circuit versus control), and any part ordered is ordered by the full model number.

Ge oven f20 error code reset

GE's published reset for fault codes: shut off the circuit breaker or fuse supplying the range or wall oven for a minute or two, then restore power. GE says this will sometimes clear the code. If the control does not reset and F20 returns, GE says service is required — and recommends leaving the oven off at the breaker until it is serviced.

GE range F-codes clear with a power reset: trip the breaker for about 5 minutes, restore power, and run a bake test. Codes that return during the start-up self-check (GE boards test the sensor circuit and keypad within seconds of power-up) point at an active component fault, not a stored glitch.

Why does the F20 code keep coming back?

F20 that returns at the same point in the same kind of cycle is a fault reproducing on cue: returning only at high temperatures or in self-clean points at the heat-stressed members (sensor, its connection, a control output that sticks when hot); returning from a cold start points at a hard fault in the temperature-reporting chain. Log the cavity, function, set temperature and minutes-to-code for the technician — that pattern halves the diagnosis. Read an F20's returns as a narrowing funnel. Returns only at the highest temperatures, with long gaps between them, describe a member of the temperature chain that is marginal when heat-soaked — sensor, connection or control output — and each return will tend to arrive sooner and at lower temperatures as the member degrades. Returns at ordinary baking temperatures, or from a cold start, describe a hard fault that has finished degrading. Either pattern is service information; what neither pattern justifies is another season of breaker resets, because GE's own guidance for a fault code that does not reset is service, with the oven off at the breaker meanwhile.

How to stop F20 coming back

• A genuine over-temperature event: The cavity really did pass the threshold — the pattern to suspect when the oven felt abnormally hot, food burned far faster than the setting explains, or a heating element could be seen glowing when it should have been cycling off. Self-clean, the hottest cycle an oven runs, is the other classic setting for a genuine threshold crossing.
• Temperature information the control could not trust: The control cooks and protects by the sensor's report. A sensor that has drifted or failed, or a degraded connection between sensor and control, can report a temperature the cavity never reached — the control cannot distinguish a lying thermometer from a real overheat, and it sets the same F2/F20 code for both.
• A control that kept heating past the set point: If the oven truly overheated with a sensor reporting honestly, the remaining branch is the control itself — a heating output held on past the set temperature. This branch is only reachable once the sensor and its connection are proven, and it is service diagnosis, not a first guess.

Retrieving stored fault codes on GE oven & ranges

GE electronic range controls store fault codes (the F-code family) that often display only briefly or in a service mode; many GE boards show the last fault when a specific pad combination is pressed (detailed in the service manual for the control). The F-code chart is also printed on the tech sheet stored with the range (often in an envelope near the storage drawer or behind the rear panel).

Other GE oven & range error codes

See the full list on the GE Oven & Range error codes hub.

Codes F20 gets confused with

F3 — GE's official fault list defines F3 in one sentence: 'This code usually means that the oven sensor needs to be replaced.' F4 carries the identical GE definition; GE's public list does not split F3 and F4 into open vs shorted. GE groups its sensor codes by the part, not by the electrical failure mode: F2/F20 = the oven temperature has exceeded a preset threshold; F3 and F4 = the oven sensor usually needs to be replaced.

F96 — Internal component fault — GE's published fault list defines F96 in one sentence: 'This code usually means that an internal component needs to be replaced.' F97 and F7X carry the identical GE definition. GE's public list does not name which component; the model's own service information splits the branch. F96 is GE being deliberately non-specific, and the page has to start there, because the internet is not: technician Q&A pages attach F96 to particular parts — a cooling fan on one model, a control or sensor story on another.

F97 — Internal component fault — GE's published fault list defines F97 (with F96 and F7X) as: an internal component usually needs to be replaced. GE's public list does not name which component; the model's own tech sheet splits the branch. F97 is one of GE's deliberately non-specific codes, and reading it correctly starts with what it is not.

F350 — Upper cooling fan circuit fault, or an obstruction in the cooling fan — GE's published definition for F350 on its newest oven controls. GE's own fault-code list defines F350 plainly: there is a problem in the upper cooling fan circuit, or something is obstructing the cooling fan.

Frequently asked questions

Related guides

Facts on this page were checked against manufacturer documentation: products.geappliances.com · www.geappliances.com · www.manualshelf.com