Whirlpool Microwave Error ERR1

⚡ Quick Answer: The Whirlpool Microwave ERR1 error code signals a malfunction in the internal power relay, which can lead to the microwave failing to start or heat fo... ✅ DIY Fixable

What Does Error ERR1 Mean?

The Whirlpool Microwave ERR1 error code signals a malfunction in the internal power relay, which can lead to the microwave failing to start or heat food. Users may notice unusual buzzing sounds or the error appearing immediately upon power-on. If ERR1 persists after basic troubleshooting, it is essential to seek professional help, as the control circuitry may require inspection or repair.

Common Symptoms:

  • Microwave displays ERR1 on the control panel
  • Microwave may not start or cook
  • Unit may immediately show the error upon power‑on

Possible Causes

  • Defective power relay within the microwave’s control circuitry (medium)

How to Fix Error ERR1

DIY Fix Power cycle and basic checks

  1. Unplug the microwave from the power outlet.
  2. Wait at least 60 seconds before reconnecting power.
  3. Plug back in and attempt to use the microwave to see if ERR1 returns.
  4. Ensure the microwave is on a properly grounded, dedicated outlet.

Technician Only Inspect and repair power relay or associated control circuitry

  1. Disconnect power and remove microwave access panels.
  2. Locate and test the power relay component with a multimeter.
  3. Verify related wiring and connectors for continuity and damage.
  4. Replace the defective power relay if confirmed faulty.
  5. Reassemble the unit and verify error no longer appears.

Parts needed: Power relay assembly, Multimeter for testing

🛑 When to Call a Pro:
  • If ERR1 persists after a power cycle and basic checks
  • If you are not experienced with high‑voltage microwave components
  • If multiple error codes appear or the unit exhibits abnormal noises or smells

Next step

Choose the next step for ERR1

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

Capacitor

Stores electrical energy to assist in starting or running the motor efficiently.

Typical part-only price
$15 - $35
DIY difficulty
Easy
Estimated time
10-20 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.

Possible related component

Microwave Magnetron

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

$80 - $220 · Hard · 60-120 mins

Check fit & price
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 ERR1 error mean on Whirlpool Microwave?

ERR1 indicates a power relay malfunction, preventing the microwave from starting or heating.

Can I fix Whirlpool Microwave ERR1 error myself?

Yes, try power cycling the microwave by unplugging it for 60 seconds before reconnecting.

How much does it cost to fix ERR1 error?

Repair costs for ERR1 can range from $50 to $200, depending on the necessary repairs.

When should I call a technician for ERR1?

Call a technician if ERR1 persists after power cycling or if you're not comfortable with high-voltage components.

Data last verified: 2026-07-31

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