Doing some Hayward heat pump troubleshooting?
These Hayward heat pump error code explanations will help you fix the most common Hayward pool heater problems.
Hayward Heat Pump Error Codes
Need help troubleshooting or repairing your pool heater?
Hayward heat pump error code PS | FLo
PS | FLo
What it means: water pressure switch detecting low water levels in the heat pump
How to fix it:
- Check that pool pump is receiving enough water
- Ensure that your pool pump is sending water to the heat pump
- For variable speed pool pumps, try putting the pump speed up a notch
- Check for any clogs or backups causing poor water circulation (filter, pump/skimmer baskets)
- Ensure that bypass valve is closed and that all other valves are open
Hayward heat pump error code LP | LP3
LP | LP3
What it means: something is obstructing the heat pump’s air flow | LP3: 3 consecutive LP faults have occurred, unit shut down
How to fix it:
- Make sure the heat pump’s vents are cleared and allowing for airflow
- Troubleshoot the issue with a pool heater repair tech
Hayward heat pump error code HP | HI | HP3
HP | HI | HP3
What it means: this code (HP & HI) indicates low water flow or high pool water temperature | HP3: 3 consecutive high-pressure faults have occurred, unit shut down
How to fix it:
- Try previous troubleshooting steps for PS error code
- Set unit to ACP (if available)
- Use a thermometer to check that the pool temperature matches the heater’s temperature reading
- Call pool heater repair tech to troubleshoot unit
Hayward heat pump error code SH | SF | OP | Pc
SH | SF | OP | Pc
What it means: water temperature sensor is shorted or defective
How to fix it:
- Seek professional pool heater repair for help troubleshooting and replacing sensor
Hayward heat pump error code dPo
dPo
What it means: the temperature probe on the suction side of the pump may be disconnected, open, or defective
How to fix it:
- Call professional pool heat pump repair technician to inspect the probe, and replace if defective
Hayward heat pump error code dPc
dPc
What it means: the temperature probe on the suction side is shorted or defective
How to fix it:
- Call professional pool heat pump repair technician to replace the probe
Hayward heat pump error code FS | dEF
FS | dEF
What it means: unit is automatically defrosting (frost may be temporarily visible on coils)
How to fix it:
- Nothing, this is normal
Hayward heat pump error code cOP | cSH
cOP | cSH
What it means: coil sensor failure or short
How to fix it:
- Call professional pool heat pump repair technician to inspect coil sensor, and replace if defective
Hayward heat pump error code PNL | PST
PNL | PST
What it means: control panel is not receiving a signal | PST: a panel button is stuck
How to fix it:
- Seek professional pool heater troubleshooting help
- If PST: try to release the button
Hayward heat pump error code PST
PST
What it means: control panel is not receiving a signal
How to fix it:
- Seek professional pool heater troubleshooting help
