Booking today · Houston service windows 9–12 · 1–4 · 4–7 Independent Maytag specialists · Licensed & insured Mon–Fri 7:00 AM - 8:00 PM · Sat 8:00 AM - 6:00 PM
(713) 936-6390 Book a House Call
Error code · Microwave

Maytag Over-the-Range Microwave Code F3H: Humidity Thermistor on the Sensor Circuit

F3H on a Maytag over-the-range microwave and hood combination points to the humidity thermistor or its wiring. This is a temperature-sensing part used with the humidity measurement that sensor cooking relies on. You will see F3H…

Medium · inspection needed
Book a House Call(713) 936-6390
Code
F3H
Appliance
Microwave
Brand
Maytag
Warranty
30-day workmanship

What F3H means

F3H on a Maytag over-the-range microwave and hood combination points to the humidity thermistor or its wiring. This is a temperature-sensing part used with the humidity measurement that sensor cooking relies on. You will see F3H in the display, and sensor-based cooking features may stop working. Timed cooking may still work. These hood microwaves are in many Houston kitchens, and we repair them, including older ones.

Common causes of F3H

  • Humidity thermistor
  • Wiring or connector to the thermistor
  • Appliance control board input for the sensor
✓ One safe check you can try

1. Take the microwave off its breaker for one full minute. 2. Switch it on again. 3. Stay nearby for one minute to see whether F3H comes back. 4. Verify operation with a short test, such as a cup of water. 5. Use timed cooking while the sensor is unchecked.

! Why to stop there
  • F3H could be the thermistor, its wiring or the control input, and the display does not say which.
  • We test the sensor circuit before replacing anything.
  • You get a written price first, and we are plain with you when an older microwave is not worth the repair.
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

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 SEMaytag Microwave Code SE: Keypad Wiring Check After Reset
F3HF3H questions
What is the humidity thermistor?

It is a sensor that works with the humidity measurement used for sensor cooking. F3H means that thermistor, or the wiring that connects it, may have a problem, and the control cannot read it.

How does F3H differ from F3H1?

They are close. F3H names the humidity thermistor, while F3H1 names the humidity sensor. Both lead to the same reset step and the same kind of test.

Can I still use timed cooking?

Often yes after a reset. Use the timer, watch the food, and keep the door closed during cooking until we have tested the sensor circuit and given you a written price for any repair.

Book a visit

Still seeing F3H?

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

(713) 936-6390