Whirlpool Microwave Error ERR7

⚡ Quick Answer: The Whirlpool Microwave error code ERR7 indicates a fault related to the humidity sensor, control board, or user interface. Symptoms include the ERR7 ... ✅ DIY Fixable

What Does Error ERR7 Mean?

The Whirlpool Microwave error code ERR7 indicates a fault related to the humidity sensor, control board, or user interface. Symptoms include the ERR7 code appearing on the display upon startup or during operation, often accompanied by abnormal buzzing sounds and a failure to heat food. The error may persist even after basic resets, suggesting an underlying issue that may require professional attention.

Common Symptoms:

  • Microwave displays ERR7 on the control panel upon power‑up or during operation
  • Microwave may not operate normally until the error is cleared
  • Error persists after normal use or after simple reset

Possible Causes

  • Humidity sensor abnormal reading (medium)
  • Control board / appliance manager issue affecting diagnostics (medium)
  • User interface/keypad or wiring fault affecting system diagnostics (low)

How to Fix Error ERR7

DIY Fix Power cycle the microwave

  1. Turn off the microwave at the circuit breaker or unplug it from the power outlet.
  2. Wait at least 1 minute.
  3. Restore power and observe if the ERR7 code returns.

Technician Only Inspect and replace humidity sensor or related wiring

  1. Disconnect power to the microwave.
  2. Access the humidity sensor assembly and associated wiring harness.
  3. Test sensor readings against manufacturer specifications using a multimeter.
  4. Inspect wiring and connectors for continuity or damage.
  5. Replace the humidity sensor or repair wiring as needed.

Parts needed: Humidity sensor, Wiring harness/connectors

Technician Only Diagnostic of control board or appliance manager

  1. Perform full diagnostic using service manual procedures.
  2. Check control board voltages and communication with sensors.
  3. Replace control board if faulty.

Parts needed: Control board / appliance manager

🛑 When to Call a Pro:
  • If ERR7 recurs immediately after power cycling.
  • If you are not comfortable accessing internal components or lack proper tools.
  • If symptoms suggest broader control board failure beyond sensor issues.

Technical Specifications

wattage 1000W
component Magnetron
resistance 0.5-1.5 ohms
part_number W10709845
voltage_rating 120V AC

Common Questions

What does ERR7 error mean on Whirlpool Microwave?

ERR7 indicates a humidity sensor fault or issues with the control board and user interface.

Can I fix Whirlpool Microwave ERR7 error myself?

Yes, try power cycling the microwave by unplugging it for 1 minute and restoring power.

How much does it cost to fix ERR7 error?

Estimated repair costs range from $30 to $120 for sensor replacements.

When should I call a technician for ERR7?

Call a technician if the ERR7 reappears after power cycling or if you're uncomfortable with internal repairs.

Sources & References

Data last verified: 2026-01-10

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