Kenmore Microwave Error F1

⚡ Quick Answer: The Kenmore microwave F1 error indicates a malfunction in the control system, commonly linked to a faulty thermistor or temperature sensor. This failu... ✅ DIY Fixable

What Does Error F1 Mean?

The Kenmore microwave F1 error indicates a malfunction in the control system, commonly linked to a faulty thermistor or temperature sensor. This failure may result in unresponsive buttons and prevent the microwave from heating food properly. The error can appear at startup or during cooking, signaling that the microwave requires attention to restore its functionality.

Common Symptoms:

  • Microwave displays "F1" on the control panel
  • Microwave may not heat food
  • Error appears on startup or during attempted cooking

Possible Causes

  • Open or failed thermistor / temperature sensor (medium)

How to Fix Error F1

DIY Fix Power cycle and basic reset

  1. Unplug the microwave from the electrical outlet.
  2. Wait for 2–5 minutes to allow internal capacitors to discharge.
  3. Plug the microwave back in and check if the F1 code clears.

Technician Only Inspect and test thermistor / temperature sensor

  1. Disconnect power to the microwave.
  2. Access the internal thermistor or temperature sensing component per the service manual.
  3. Use a multimeter to check resistance of the thermistor; confirm expected resistance at room temperature per model specification.
  4. Replace thermistor if open or out of specification.
  5. Reassemble and power test to verify error resolution.

Parts needed: Thermistor / temperature sensor, Multimeter for diagnostics

🛑 When to Call a Pro:
  • If the error persists after basic reset and sensor inspection
  • If you are not confident working inside a microwave
  • If the thermistor tests within specification but error remains

Technical Specifications

wattage 1000W
component Control Board
resistance N/A
part_number WB27X10929
voltage_rating 120V AC

Common Questions

What does F1 error mean on kenmore microwave?

The F1 error means there's a malfunction in the control system, often due to a faulty thermistor.

Can I fix kenmore microwave F1 error myself?

Yes, you can attempt a basic reset by unplugging the microwave and waiting a few minutes.

How much does it cost to fix F1 error?

Repair costs for the F1 error are low to medium, as replacement parts for the thermistor are generally inexpensive.

When should I call a technician for F1?

Call a technician if the error persists after a reset or if you're unsure about inspecting internal components.

Sources & References

Data last verified: 2026-02-19

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