De'Longhi Microwave Error E12

⚡ Quick Answer: The E12 error code on Delonghi microwaves typically indicates a malfunction in the magnetron, which is responsible for generating heat. Users may noti... ⚠️ Difficulty Varies

What Does Error E12 Mean?

The E12 error code on Delonghi microwaves typically indicates a malfunction in the magnetron, which is responsible for generating heat. Users may notice unusual buzzing sounds or experience failure in heating food. If this error occurs, it is essential to perform basic troubleshooting steps, including checking the door closure and resetting the microwave by unplugging it for a few minutes. If the error persists, further diagnosis may be required.

Possible Causes

  • Magnetron

How to Fix Error E12

DIY Fix Check power and basic status

  1. Unplug the microwave from mains power for at least 1–2 minutes
  2. Inspect door closure and ensure it is fully closed
  3. Plug the microwave back in and see if the error persists

DIY Fix Consult the official manual or support

  1. Locate your exact Delonghi microwave model number (usually on a label on the back or inside the door frame)
  2. Download or view the official user manual from De’Longhi’s support site (manuals are available for various microwave models) to see if E12 is documented specific to your model
  3. Contact De’Longhi customer support with the model number and error code for official guidance

Technician Only Professional diagnosis

  1. Technician to inspect the internal control board and sensors with appropriate tools
  2. Verify if any component (door sensors, humidity/steam sensors, control board) is signaling an error corresponding to code E12
  3. Test circuits for continuity and correct sensor responses

Parts needed: multimeter/testing tools, replacement sensors or boards if identified faulty

🛑 When to Call a Pro:
  • If the error persists after basic power reset
  • If there are additional symptoms such as burning smell, smoke, or inability to close the door properly

Next step

Choose the next step for E12

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Microwave Magnetron

Generates microwave energy for heating food and requires high-voltage service procedures.

Typical part-only price
$80 - $220
DIY difficulty
Hard
Estimated time
60-120 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Model number required

Model-compatible Microwave parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Technical Specifications

note The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering.
part_number None

Common Questions

What does E12 error mean on delonghi microwave?

The E12 error indicates a magnetron malfunction, often resulting in buzzing sounds or failure to heat.

Can I fix delonghi microwave E12 error myself?

Yes, you can try resetting the microwave and checking the door closure. Consult the manual for model-specific advice.

How much does it cost to fix E12 error?

Repair costs typically range from $100 to $300, depending on diagnosis and parts needed.

When should I call a technician for E12?

Call a technician if the error persists after a reset or if you notice burning smells or door issues.

Sources & References

Data last verified: 2026-07-31

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