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
- Turn off electrical power to the water heater at the breaker
- Wait for 1–2 minutes and turn the breaker back on to reset the control/module
- Observe if E03 clears
Technician Only Thermistor sensor replacement
- Turn off power at the breaker and verify no electrical load
- Access the electronic thermostat/control assembly
- Test upper thermistor sensor resistance and wiring for open/short conditions
- Replace the upper thermistor sensor (or entire electronic thermostat assembly if integrated)
- Restore power and confirm the error no longer displays
Parts needed: Upper thermistor sensor, Electronic thermostat assembly (if required)
- 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
Next step
Choose the next step for E03
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Thermistor
Measures precise temperature changes and sends resistance feedback to the control board.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 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.
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.
Thermostat
Regulates temperature by turning the heating or cooling system on or off.
Model-compatible Water Heater 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.
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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 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: 2026-07-31
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