E23 is the preheat-not-reached code: thirty minutes passed without the oven getting to temperature.
Model compatibility: KitchenAid reuses codes across series and model years, so E23 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
The oven did not reach preheat temperature within 30 minutes; a heater, control board or wiring problem is possible.
On a KitchenAid microwave that includes an oven function, E23 is shown when preheating takes too long. The wording from KitchenAid: the oven did not reach preheat temperature within thirty minutes.
At a glance
| Code | E23 |
|---|---|
| What it means | The oven did not reach preheat temperature within 30 minutes; a heater, control board or wiring problem is possible. |
| What you can check | Turn off the breaker feeding the microwave, count a full minute, turn it back on and watch for another minute. Then test that the oven works as usual. |
| When to call a technician | If E23 returns after the reset, schedule a service visit. No owner test separates a heater fault from a board or wiring problem. |
Suspects in the support article
| Possible problem | Role |
|---|---|
| Heater | Brings the cavity up to temperature |
| Appliance control board | The electronics that run the oven |
| Wiring | Connects the heater and the board |
Each is written as “may be a problem.” KitchenAid does not say which is most common and gives no owner test, so deciding between them is a technician’s job.
Steps to try first
- Find the breaker feeding the microwave at the house panel and turn it off. Count a full minute.
- Turn the breaker on.
- Keep watching for another minute to see if E23 appears again.
- Test the oven to confirm that it works as usual.
If E23 does not return, you are finished. If it does, KitchenAid’s article moves to service.
How E23 relates to other codes
E23 is about too little heat. E24 is the other direction, an overheat condition at 500F (260C). A message saying the oven could not carry out a function is a different code, F9. If a sensor circuit report shows instead, see E21 and E22.
Microwave repair in the Miami, New York, Houston, Los Angeles and San Diego areas
Book KitchenAid microwave repair in those metro areas through (844) 919-2035. When you call, give the model number, the code E23, and the fact that the breaker was already switched off for a minute.
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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