Whirlpool Microwave Error ERR3

⚡ Quick Answer: The Whirlpool Microwave ERR3 error indicates a malfunction in the keypad or key input circuitry. Users may notice the ERR3 code displayed on the scree... ✅ DIY Fixable

What Does Error ERR3 Mean?

The Whirlpool Microwave ERR3 error indicates a malfunction in the keypad or key input circuitry. Users may notice the ERR3 code displayed on the screen, along with unresponsive buttons and an inability to accept commands. This issue can stem from a defective keypad, a failed user interface board, or wiring problems connecting these components. Addressing this error may involve basic troubleshooting or professional repair.

Common Symptoms:

  • ERR3 displayed on the microwave’s digital screen
  • Microwave may not accept key presses or commands
  • Buttons may feel unresponsive or stuck

Possible Causes

  • Defective keypad or individual keys (medium)
  • User interface board failure (medium)
  • Wiring issue between keypad and control board (medium)

How to Fix Error ERR3

DIY Fix Basic keypad check and power reset

  1. Unplug the microwave from power for at least 60 seconds.
  2. Plug it back in and observe if ERR3 returns.
  3. Try gently cleaning around the keypad with a dry cloth to remove debris.

Technician Only Inspect and replace keypad/user interface wiring or assembly

  1. Unplug the unit and remove outer cabinet.
  2. Inspect wiring harness between keypad and control board for loose connections, corrosion, or damage.
  3. Test keypad membrane and interface board continuity.
  4. Replace defective keypad or user interface board as needed.

Parts needed: Keypad assembly, User interface board, Connector harness

🛑 When to Call a Pro:
  • If ERR3 persists after basic reset and keypad cleaning
  • If multiple error codes appear or keypad checks show no improvement
  • If internal inspection reveals wiring damage or ambiguous failures

Technical Specifications

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

Common Questions

What does ERR3 error mean on Whirlpool Microwave?

ERR3 indicates a fault in the keypad or key input circuitry, causing unresponsive buttons and command failures.

Can I fix Whirlpool Microwave ERR3 error myself?

Yes, try unplugging the microwave for 60 seconds and clean around the keypad. If the issue persists, professional help may be needed.

How much does it cost to fix ERR3 error?

Estimated repair costs for the ERR3 error range from $40 to $180, depending on the needed parts.

When should I call a technician for ERR3?

Call a technician if ERR3 persists after a reset, if multiple error codes appear, or if wiring issues are suspected.

Data last verified: 2026-01-10

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