Aeg Microwave Error F104

⚡ Quick Answer: The AEG microwave error F104 indicates a malfunction in the temperature sensor, which may lead to out-of-range readings. This issue often prevents the... ⚠️ Difficulty Varies

What Does Error F104 Mean?

The AEG microwave error F104 indicates a malfunction in the temperature sensor, which may lead to out-of-range readings. This issue often prevents the microwave from starting or causes it to shut down to ensure safe operation. Users may also hear unusual buzzing sounds, and food will not heat properly due to this sensor failure.

Common Symptoms:

  • Error code F104 displayed on microwave
  • Microwave may not start or may shut down to prevent unsafe operation

Possible Causes

  • Temperature sensor malfunction or out‑of‑range readings (high)

How to Fix Error F104

DIY Fix Basic checks and reset

  1. Turn off and unplug the microwave for at least 5–10 minutes.
  2. Ensure the kitchen environment is not extremely cold, which can affect sensor readings. (Community advice notes cold environments can trigger F104.)
  3. Plug the microwave back in and try a normal operation cycle.

Technician Only Sensor diagnosis and replacement

  1. Disconnect power and remove the microwave outer casing according to service manual.
  2. Visually inspect the temperature sensor and its wiring for damage or loose connections.
  3. Measure the sensor resistance with appropriate tools and compare with manufacturer specifications.
  4. Replace the sensor if readings are outside tolerance or visibly damaged.
  5. Verify associated wiring harness and connectors are intact before reassembly.

Parts needed: Temperature sensor, Sensor wiring harness

🛑 When to Call a Pro:
  • If the error code persists after a basic power reset
  • If you are not experienced with internal appliance repair
  • If there are signs of electrical or wiring damage

Technical Specifications

wattage 800W
component Magnetron
resistance 0.5-1.5 ohms
part_number AEG 1240000001
voltage_rating 230V AC

Common Questions

What does F104 error mean on AEG microwave?

F104 error indicates a malfunction in the temperature sensor, preventing the microwave from operating safely.

Can I fix AEG microwave F104 error myself?

Yes, you can try resetting the microwave and checking the environment, but further issues may require professional help.

How much does it cost to fix F104 error?

Repair costs range from $50 to $150 for parts, plus labor, depending on service rates.

When should I call a technician for F104?

Call a technician if the error persists after resetting or if you notice electrical damage.

Sources & References

Data last verified: 2026-04-14

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