F3H1 names the humidity sensor and its wiring as the possible fault.
Model compatibility: KitchenAid reuses codes across series and model years, so F3H1 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
What this code means
Possible problem with the humidity sensor or its wiring.
The entry in brief
Under F3H1, KitchenAid says just this: the humidity sensor or its wiring may be to blame. The article offers nothing further on diagnosis.
At a glance
| Code | F3H1 |
|---|---|
| What it means | Possible problem with the humidity sensor or its wiring. |
| What you can check | Turn the microwave breaker off for a whole minute and back on, watch the display for the next minute, and verify the microwave works. No cover needs removing. |
| When to call a technician | If F3H1 shows up again, schedule a service visit. Pass along the full code, including the final 1, since similar humidity codes point to a different part. |
Two similar humidity codes
- F3H1 names the sensor.
- F3H and F4E4 name the thermistor.
Which of the two you saw matters to the technician, so copy the code carefully, final 1 included.
Power reset
- Turn off the breaker(s) for the microwave for a whole minute.
- Turn the breaker(s) back on.
- Watch the display over the next minute to see if F3H1 returns.
- Verify that the microwave works.
This reset needs only the breaker box: no cover removed, no tool, no touching the sensor. Leave it at that.
Gaps in the source
You will not find a symptom, the cooking modes involved or an owner inspection in the article. For the sensor’s role, check your own owner’s manual.
After the reset
If F3H1 shows up again, the article’s answer is its service option. Meanwhile you can read F8E5, about the exhaust air temperature sensor, and F3T3, about the hood temperature thermistor.
Microwave service in the Miami, New York, Houston, Los Angeles and San Diego areas
Call (844) 919-2035 from any of those metro areas to talk about a KitchenAid microwave with F3H1. Be ready with the model number.
Source: KitchenAid Product Help, Over-the-Range Microwave Error Code
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Sources & references
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