F3T4 flags the magnetron temperature thermistor or wiring.
Model compatibility: KitchenAid reuses codes across series and model years, so F3T4 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 magnetron temperature thermistor or its wiring.
On KitchenAid’s over-the-range microwave page, F3T4 is tied to the magnetron temperature thermistor and the wiring around it.
At a glance
| Code | F3T4 |
|---|---|
| What it means | Possible problem with the magnetron temperature thermistor or its wiring. |
| What you can check | Keep power off at the breaker for one minute, turn it on, and stay for a minute to see whether the code displays again. Verify that the microwave operates. |
| When to call a technician | If F3T4 returns, arrange a service visit. Magnetron work is best left to a technician, so keep covers on and mention any odd vent door behavior. |
Magnetron in a sentence
The magnetron is the component that produces microwave energy; the article does not describe it, so this is general background. The thermistor in the code is its temperature-sensing partner. KitchenAid is silent on the effect of a wrong thermistor reading.
Steps
- Turn the microwave’s breaker(s) off, keeping power off for one minute.
- Turn the breaker(s) on.
- Stay for one minute and see if F3T4 displays again.
- Verify the microwave’s operation.
Nothing here goes beyond the breaker panel, and the article never asks you to remove a cover.
Service threshold
If F3T4 returns, the article offers service and no extra owner action. Magnetron work is best left to a technician regardless; this is general safety, not article content.
Compare with these entries
- F3T3 covers the thermistor for the hood
- F3T2 covers the thermistor for convection
- E24 reports overheating at 500F (260C)
Why the full code counts
A technician prefers the complete four-character code to a vague “F3” description. Mention any odd vent door or exhaust behavior too, as KitchenAid lists those separately. The article does not discuss cooking performance, heat output or noise, so do not infer any of them from F3T4.
Service for KitchenAid microwaves in key metro areas
The Miami, New York, Houston, Los Angeles and San Diego metro areas are served through (844) 919-2035. Mention F3T4 and 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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