Microwave High Severity
F1 Appliance Error Code

Electrolux Microwave F1 Error: Cooking cavity temperature sensor is open or shorted.

Electrolux microwave f1 error — understanding this error code helps you decide on the right course of action for your Electrolux appliance. What Is Electrolux Microwave Error Code F1? Error code F1 on Electrolux microwaves indicates a fault with the cooking cavity thermistor. This temperature sensor, typically an NTC type, is mounted inside the microwave […]

By Patrick Cooper Lead Appliance Repair Specialist & Technical Writer

No

DIY Fixable

From $220

Typical Repair Cost

60-120 min

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

No. The microwave should not be used while F1 is active. Without a functioning cavity thermistor, the unit cannot monitor internal temperature, which could lead to overheating or fire.

Can I reset the code?

Yes. A power cycle may clear the code temporarily, but if the thermistor is genuinely faulty, F1 will return during the next use.

When to stop immediately?

Stop if you notice: Stop immediately if you smell burning or see smoke inside the microwave cavity., Do not attempt to remove any panels or covers from the microwave housing..

Symptoms You May Notice

F1 displayed on the control panel

The microwave shows F1 and all cooking functions are disabled.

Microwave will not start

Pressing start produces no response or a beep followed by the F1 code reappearing.

Error appears during cooking

The microwave stops mid-cycle and displays F1, leaving food uncooked.

Sensor cooking modes fail immediately

Auto-cook or sensor reheat modes trigger F1 within seconds of starting.

Possible Causes

1

Failed cavity thermistor

The NTC thermistor inside the cooking cavity has degraded or failed, producing open or short circuit readings.

Requires Professional
2

Corroded sensor wiring

Steam and food splatter have corroded the sensor leads where they exit the cavity wall.

Requires Professional
3

Control board input circuit damage

The analog input circuit on the control board that reads the thermistor resistance has been damaged by a power surge.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Power cycle the microwave

    Unplug the microwave or turn off its breaker for two minutes, then restore power.

    Wait the full two minutes to ensure the control board fully resets.

  2. 2

    Clean the cavity interior

    Wipe down the inside of the microwave with a damp cloth to remove food residue and moisture from the sensor area.

    The thermistor is usually a small probe or disc near the top or upper side of the cavity.

  3. 3

    Test basic microwave function

    After the power cycle, try running the microwave for 30 seconds with a cup of water inside to see if F1 returns.

    Always place a microwave-safe load like water inside when testing — never run a microwave empty.

When to Call a Professional

Contact a qualified technician if:

  • The F1 code returns immediately after every power cycle without any cooking attempt.
  • The microwave was recently exposed to a power surge or lightning event.
  • Visible corrosion or damage is present around the sensor probe inside the cavity.

Need Professional Help?

Find qualified technicians in your area for proper diagnostics and repair.

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