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Error code · Microwave

Whirlpool Over-the-Range Microwave, Code E23: Slow to Reach Preheat

E23 on a Whirlpool over-the-range microwave, including models WMH31017HS, WMH32519HZ and WMH53521HZ, means the oven did not reach its preheat temperature within thirty minutes. The guidance says the heater, the appliance control board or the wiring…

Medium · inspection needed
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Code
E23
Appliance
Microwave
Brand
Whirlpool
Warranty
30-day workmanship

What E23 means

E23 on a Whirlpool over-the-range microwave, including models WMH31017HS, WMH32519HZ and WMH53521HZ, means the oven did not reach its preheat temperature within thirty minutes. The guidance says the heater, the appliance control board or the wiring may be responsible. You will notice that a preheat runs long, then stops with E23 in the display. This points to the heating start-up rather than the keypad.

Common causes of E23

  • Heater
  • Appliance control board
  • Wiring to the heater and sensor
✓ One safe check you can try

1. Turn off the breaker for the microwave and leave it off for one minute. 2. Turn it on again. 3. Monitor the microwave for one minute to see that E23 does not return. 4. Start the same preheat again and see whether the oven gets going. 5. Keep the vents clear and do not place anything on top of the unit.

! Why to stop there
  • A reset cannot tell a weak heater from a control that is not switching it on, so we test the heating circuit.
  • If the oven heats food unevenly as well, that is useful information for the diagnosis.
  • We quote the repair in writing, and on an older unit we tell you if replacing is wiser.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
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Other Microwave codes

FC E8Whirlpool OTR Microwave Registration Code FC E8: Entry Mistake FCE8Whirlpool Over-the-range Microwave Registration, FCE8: Wrong Model Selected Feature Not Available or Fault DetectedWhirlpool Built-in Microwave Message "Feature Not Available": Retry or Cut Power LOCWhirlpool Microwave LOC on the Display: Control Lock Is On PFWhirlpool Over-the-range Microwave Showing PF: Power Failure Indicator Press Cancel to ResetWhirlpool Built-in Microwave Message "Press Cancel to Reset": Error Cleared by Cancel F8 E4Whirlpool Microwave Drawer Error Code F8 E4: Exhaust Air Temperature Sensor Probe or Insert ProbeWhirlpool Built-in Microwave Asking for "Insert Probe": Seat the Meat Probe
E23E23 questions
What does E23 mean?

The oven did not get to preheat temperature in thirty minutes. The heater, the control board and the wiring are the areas the guidance names.

Why did the preheat run so long before the code showed?

The control waits and gives up after thirty minutes without reaching preheat temperature. The code appears when that limit is reached, so a long preheat before the message is expected.

Can E23 be fixed without replacing the whole microwave?

Often yes, since the cause is usually one part or connection in the heating circuit. We tell you plainly if a repair is not worth it.

Book a visit

Still seeing E23?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107