F4E3 is a short KitchenAid entry: the microwave exhaust air temperature sensor or wiring. Reset the breaker, then call if needed.
Model compatibility: KitchenAid reuses codes across series and model years, so F4E3 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 Microwave Exhaust Air Temperature Sensor or its wiring.
A narrow code: F4E3 offers two possibilities, the microwave exhaust air temperature sensor and the wiring that serves it.
At a glance
| Code | F4E3 |
|---|---|
| What it means | Possible problem with the Microwave Exhaust Air Temperature Sensor or its wiring. |
| What you can check | Turn off the breaker that feeds the oven, wait a minute, and turn it on. Watch the oven for another minute to see whether F4E3 reappears, then confirm normal operation. |
| When to call a technician | Arrange service if F4E3 returns after the reset. Leave trim and panels alone, since there is no owner way to reach the sensor. |
Reading the code’s name
Read it from the left. It is a microwave part, it relates to exhaust air, and it measures temperature. Generally, exhaust air is what exits a compartment, and a sensor in that stream tells the control how warm it is. KitchenAid’s text does not give the mounting position or the trip temperature.
Steps in order
First turn off the breaker that feeds the oven. After a minute, turn it on. Then watch the oven for a minute, checking whether F4E3 reappears, and finish by confirming normal operation.
For owners
| Fine to do | Leave alone |
|---|---|
| Run the reset as written. Note whether and when the code returns. | Trim and panels. KitchenAid says nothing about reaching the sensor. |
Same thing as an oven fan code?
It is not. F4E3 refers to the microwave’s exhaust air sensor, and the oven-side fan codes are listed separately by KitchenAid.
When to call
Get in touch with service if the code returns following the reset.
Neighbouring entries
- F4E4: microwave humidity sensor, another sensor code in the same run
- F4E6: microwave wave guide temperature sensor
- F8E4 / F8E5: oven-side exhaust fan air temperature sensor
KitchenAid oven repair in our service metros
Our coverage includes the Miami, New York, Houston, Los Angeles and San Diego metro areas. Phone (844) 919-2035 with F4E3 written down and the outcome of your reset; the oven repair page shows what else is helpful.
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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