Error code
GE microwave error code F4
GE microwave error code F4: Open humidity sensor. Which machines can actually raise it, where the number lives on this make, and what to do next.
- From $95 diagnostic, credited to the repair
- 59 cities and neighborhoods covered
- OEM parts available on order
- In writing the price, before anything is opened
What we can confirm
Code F4, from the manufacturer's own documentation
A code is only meaningful together with the machine showing it — the same digits mean different things on different equipment.
The code
F4
Open humidity sensor. GE's sensor-cooking features depend on it, so a microwave with this code usually still heats on manual settings and fails only on the automatic ones.
or call (305) 306-2503
What it narrows down to
Open humidity sensor. GE's sensor-cooking features depend on
Diagnostic
From $95, credited to the repair
On the same appliance
What else belongs to the microwaves
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
Open thermal sensor, caused by excessive heat in
Shorted thermal sensor. The companion to F1: where
Shorted touch pad panel. This is the clearest
Shorted humidity sensor — the short-circuit companion to
Shorted temperature probe. Like the range's FD, this
Shorted touch screen — the touch-screen equivalent of
Open temperature probe, or the probe is not
A power failure notice, displayed as PF, 888
Not an error. GE documents 18 in the
The same digits mean different things on different equipment. Search the full code list
In more detail
About GE microwave error code F4
What F4 means, in the maker's own words
Open humidity sensor. GE's sensor-cooking features depend on it, so a microwave with this code usually still heats on manual settings and fails only on the automatic ones.
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
- Test the appliance on a manual time-and-power setting. If that works, the humidity sensing is the whole problem and the repair can be planned rather than rushed.
- Clear power for a minute and restore.
- If it persists, the sensor and its wiring are 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 and describe what the display is doing before booking anything.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards