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Error code · Microwave

Maytag Over-the-Range Microwave Codes E21 and E22: Thermal Sensor Circuit

E21 and E22 on a Maytag over-the-range microwave and hood combination point to the thermal sensor circuit. E21 means the control board saw that circuit as open, and E22 means it saw the circuit as shorted.…

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Code
E21 or E22
Appliance
Microwave
Brand
Maytag
Warranty
30-day workmanship

What E21 or E22 means

E21 and E22 on a Maytag over-the-range microwave and hood combination point to the thermal sensor circuit. E21 means the control board saw that circuit as open, and E22 means it saw the circuit as shorted. There may be a problem with the thermal sensor, the appliance control board or the wiring. You will see the code in the display, and the oven function may stop or refuse to start. Microwave-only cooking may still work.

Common causes of E21 or E22

  • Thermal sensor in an open or shorted condition
  • Wiring or connector in the sensor circuit
  • Appliance control board input
✓ One safe check you can try

1. Switch off the microwave breaker and wait one full minute. 2. Switch it back on. 3. Monitor the microwave for one minute to see whether E21 or E22 returns. 4. Verify the microwave by heating a cup of water for a short time. 5. Keep the vents above and in front free of items.

! Why to stop there
  • Open versus shorted tells us which way the sensor circuit is wrong, but not whether the sensor, the wiring or the board is responsible.
  • We test the circuit and the sensor reading before replacing anything.
  • You approve a written price first, and older microwaves get an honest repair-or-replace opinion.
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.
→Same appliance

Other Microwave codes

F9Q or F9Q1Maytag Microwave Code F9Q or F9Q1: Reset and Function Failure FC E1, FC E2 or FC E3Maytag Microwave Code FC E1, FC E2 or FC E3: Wi-Fi Connection Lost FC E7Maytag Microwave Code FC E7: Microwave Cannot Reach the Router FC E8 or Registration ErrorMaytag Microwave Code FC E8 or Registration Error: Setup Entry Problem Flashing 0:00Maytag Countertop Microwave Code Flashing 0:00: Clock Reset After Power Loss Flashing Colon or PFMaytag Microwave Code Flashing Colon or PF: Power Loss Notice LOC, L or Padlock IconMaytag Microwave Code LOC, L or Padlock Icon: Control Lock On No or Partial DisplayMaytag Microwave Code No or Partial Display: Blank Control Panel
E21 or E22E21 or E22 questions
What is the difference between E21 and E22?

E21 means the thermal sensor circuit reads open to the control board, and E22 means it reads shorted. Both lead to the same first reset step.

Is it a safety problem?

The code means the microwave cannot trust its temperature reading, so we treat it with care. Stop using the oven function if the code returns.

Does a breaker reset fix it?

It can clear a one-time glitch. If the code comes back, the sensor circuit needs testing, and we will quote the price in writing first.

Book a visit

Still seeing E21 or E22?

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

(713) 936-6390