A.O. Smith AHPTU-80 Voltex Hybrid 80 Gal 4500W Hybrid Heat Pump Water Heater with WiFi Connectivity E03 Error Fix: Dry Fire / ECO Trip

Error code E03 on the A.O. Smith AHPTU-80 Voltex Hybrid 80 Gal 4500W Hybrid Heat Pump Water Heater with WiFi Connectivity means: Dry Fire / ECO Trip. The upper element ECO (Energy Cut Off) has tripped, or a dry fire condition was detected. The heating element was energized without being fully submerged in water, or water temperature exceeded the high limit. Ensure the tank is completely full of water. Reset the ECO by pressing the red button on the upper thermostat. If the ECO continues to trip, check for a malfunctioning thermostat, shorted element, or T&P valve stuck open causing water loss.

The most successful fix is "Test and Replace Faulty Thermostat or Heating Element" (medium difficulty, ~60 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Test and Replace Faulty Thermostat or Heating Element") is rated medium difficulty and takes about 60 minutes. Tools needed: Multimeter, T20 Torx screwdriver, Nut driver set.

DIY cost: $10-$20. Professional repair typically costs $150-$300. Many homeowners save money by trying the top-ranked community fix first.

The A.O. Smith AHPTU-80 Voltex Hybrid 80 Gal 4500W Hybrid Heat Pump Water Heater with WiFi Connectivity has 8 other known error codes, including: E01 (Upper Tank Sensor Failure), E02 (Lower Tank Sensor Failure), E04 (Compressor Discharge Over-Temperature), E05 (Evaporator Coil Sensor Failure), E06 (Condenser Fan Motor Failure), and 3 more.

Error code E03 also appears on 1 other A.O. Smith model: HPTU-50N HE Hybrid 50 Gal 4500W High Efficiency Hybrid Heat Pump Water Heater. The fix may vary by model, so check each model's specific page for tailored repair steps.