Whirlpool Water Heater Error E03

⚡ Quick Answer: The Whirlpool water heater error code E03 indicates a malfunction in the upper thermistor sensor, which can lead to insufficient heating or the unit n... ⚠️ Difficulty Varies

What Does Error E03 Mean?

The Whirlpool water heater error code E03 indicates a malfunction in the upper thermistor sensor, which can lead to insufficient heating or the unit not starting at all. If you notice this error alongside unusual clicking sounds, it's crucial to address the issue promptly to restore hot water functionality.

Common Symptoms:

  • Heater displays error code E03
  • Water heater fails to heat properly or does not start

Possible Causes

  • Upper thermistor sensor failure (medium)

How to Fix Error E03

DIY Fix Power reset and basic checks

  1. Turn off electrical power to the water heater at the breaker
  2. Wait for 1–2 minutes and turn the breaker back on to reset the control/module
  3. Observe if E03 clears

Technician Only Thermistor sensor replacement

  1. Turn off power at the breaker and verify no electrical load
  2. Access the electronic thermostat/control assembly
  3. Test upper thermistor sensor resistance and wiring for open/short conditions
  4. Replace the upper thermistor sensor (or entire electronic thermostat assembly if integrated)
  5. Restore power and confirm the error no longer displays

Parts needed: Upper thermistor sensor, Electronic thermostat assembly (if required)

🛑 When to Call a Pro:
  • If resetting does not clear the error and you are not experienced with electrical diagnostics
  • If the heater exhibits signs of electrical arcing, burning smell, or other safety hazards

Technical Specifications

wattage 4500W
component Heating Element
resistance 10-30 ohms
part_number WH23X10030
voltage_rating 240V AC

Common Questions

What does E03 error mean on whirlpool water heater?

E03 indicates a failure in the upper thermistor sensor, leading to insufficient heating.

Can I fix whirlpool water heater E03 error myself?

You can attempt a power reset by turning off the breaker, waiting, and turning it back on.

How much does it cost to fix E03 error?

Repair costs for the E03 error range from $50 to $200+, depending on parts and labor.

When should I call a technician for E03?

Call a technician if the reset doesn't work or if you notice signs of electrical arcing or burning smells.

Sources & References

Data last verified: 2026-03-18

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