---
title: "GE microwave error code F1"
description: "GE microwave error code F1: Open thermal sensor, caused by excessive heat in the microwave cavity."
url: "https://gemiami.support/error-codes/microwave-f1/"
date_modified: "2026-08-31"
Appliance type: "Microwaves"
---


# GE microwave error code F1

### What F1 means, in the maker’s own words

Open thermal sensor, caused by excessive heat in the microwave cavity. On a range F1 is the keypanel — the same two characters, a different appliance, a different repair.

### Where this code actually appears

On the control panel, and usually with a sound. GE describes their refrigerator codes as flashing green on the display and typically accompanied by a beeping, and the range, microwave and dishwasher tables all describe codes you can read from the front of the appliance. That is the opposite of some makes, where the number is written into a hidden log and never shown — here, if something is wrong, the appliance generally tells you. Photograph what it says before cutting the power, because a reset erases it and the code is most of the diagnosis.

### What to do about it

- Let the appliance cool and clear the code.
- Note what was being cooked. Excessive cavity heat usually has a cause, and an empty microwave run by accident is a common one.
- On an over-the-range unit, check that the ventilation is working — a microwave sitting above a range it cannot vent gets hot from underneath.
- If it returns, the thermal sensor circuit is measured.

### Where this goes next

The job this usually becomes is [microwave repair](/services/microwave-repair/), and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 306-2503](tel:+13053062503) and describe what the display is doing before booking anything.

What this one means

What F1 means, in the maker’s own words

Open thermal sensor, caused by excessive heat in the microwave cavity. On a range F1 is the keypanel — the same two characters, a different appliance, a different repair.

Where this code actually appears

On the control panel, and usually with a sound. GE describes their refrigerator codes as flashing green on the display and typically accompanied by a beeping, and the range, microwave and dishwasher tables all describe codes you can read from the front of the appliance. That is the opposite of some makes, where the number is written into a hidden log and never shown — here, if something is wrong, the appliance generally tells you. Photograph what it says before cutting the power, because a reset erases it and the code is most of the diagnosis.

What to do about it

Let the appliance cool and clear the code.

Note what was being cooked. Excessive cavity heat usually has a cause, and an empty microwave run by accident is a common one.

On an over-the-range unit, check that the ventilation is working — a microwave sitting above a range it cannot vent gets hot from underneath.

If it returns, the thermal sensor circuit is measured.

Where this goes next

The job this usually becomes is microwave repair, and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 306-2503](tel:+13053062503) and describe what the display is doing before booking anything.

---

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