Heat pumps · Error codes · Navien
F032Navien · PEM750
F032 on a Navien PEM750: DC fan motor 2 failure
Short answer
On a Navien heat pump, F032 means: DC fan motor 2 failure. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: DC fan motor 2 failure.
Part involved: fan motor.
Likely causes:
- Turn off and check connection; restart and check motor; replace motor.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
What you can check
- Note the code shown on the controller and the model number on the unit's rating label before contacting your installer.
- Check that the heat pump's isolator and consumer-unit breaker are on; do not open any casing.
- Check the outdoor unit is not blocked by snow, ice, leaves or debris, and do not clear ice from the fins with tools.
What the engineer will check
- Check the fan motor and its driver board connections.
- Check fan blade is free.
- Replace fan motor or fan driver board.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas and flammable-refrigerant (R32/R290) handling competence for any refrigerant-circuit work.
What you might notice
Sources
- Navien Air to Water Heat Pump UK Service Manual (EN, 250408) ↗ · 250408 · page printed p.72 (PDF p.73) · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026