Pentair Pentair UltraTemp Heat Pump Pool Heater FAN MOTOR FAIL Error Fix: Fan Motor Failure

Error code FAN MOTOR FAIL on the Pentair Pentair UltraTemp Heat Pump Pool Heater means: Fan Motor Failure. The evaporator fan motor has failed or is not spinning. The fan is critical for drawing air across the evaporator coil. Without the fan, the heat pump will quickly trip on high pressure (E04/HP) or ice up. Symptoms include the heat pump running but no air movement from the top of the unit. Check for debris blocking the fan blade. Verify the fan motor is receiving power. Replace the fan motor if it has failed.

The most successful fix is "Test and Replace Fan Motor Assembly" (hard difficulty, ~60 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Test and Replace Fan Motor Assembly") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Adjustable wrench.

DIY cost: $0. Professional repair typically costs $250-$350. Many homeowners save money by trying the top-ranked community fix first.

The Pentair Pentair UltraTemp Heat Pump Pool Heater has 8 other known error codes, including: dF (Defrost Mode), E01 (Water Temperature Sensor Fault), E02 (Coil Temperature Sensor Fault), E03 (Ambient Temperature Sensor Fault), E04 (High Pressure Switch Tripped), and 3 more.