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Error code · Microwave

Maytag Over-the-Range Microwave Code F3C: Cavity Thermistor on the Oven Function

F3C on a Maytag over-the-range microwave and hood combination points to the cavity temperature thermistor or its wiring. That thermistor is the sensor that reads the temperature inside the oven cavity. This code is for models…

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Code
F3C
Appliance
Microwave
Brand
Maytag
Warranty
30-day workmanship

What F3C means

F3C on a Maytag over-the-range microwave and hood combination points to the cavity temperature thermistor or its wiring. That thermistor is the sensor that reads the temperature inside the oven cavity. This code is for models with an oven or convection function. You will see F3C in the display, and the oven function may stop or not start. Microwave-only cooking may still work. We service these combination units in Houston.

Common causes of F3C

  • Cavity temperature thermistor
  • Wiring or connector to the thermistor
  • Appliance control board input
✓ One safe check you can try

1. Turn the microwave breaker off for one full minute. 2. Turn it back on. 3. Look at the display for one minute to see whether F3C returns. 4. Verify oven operation with a short test. 5. Keep the vents on the front and top clear.

! Why to stop there
  • The code names the thermistor and its wiring, but it cannot show which is responsible.
  • We read the sensor circuit before replacing a part.
  • You approve a written price first, and we tell you honestly when an older combination unit is not worth repairing.
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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F3CF3C questions
What does the cavity temperature thermistor do?

It measures the temperature inside the oven cavity and reports it to the control. F3C means there may be a problem with it or its wiring.

Does F3C affect plain microwave cooking?

Often not. The code concerns the temperature sensor of the oven cavity, so microwave-only cooking may still work after a breaker reset. Test it with a cup of water before relying on it.

What will you check?

We test the thermistor and its connection, tell you what we find in plain words, and give a written price before any work begins. If the unit is old, we also say whether repair makes sense.

Book a visit

Still seeing F3C?

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

(713) 936-6390