Working on AquaComfort heat pump troubleshooting?
Check out the explanations for these AquaComfort heat pump error codes:
AquaComfort Heat Pump Error Codes
Need help troubleshooting or repairing your pool heater?
AquaComfort heat pump error codes FLO, FS, F1
(My AquaComfort heat pump says FLO)
FLO, FS, F1
What it means: sensors are detecting low water levels in the heat pump
How to fix it:
- Make sure the pool pump is receiving enough water
- Check that the pump is sending enough water to the heat pump
- Variable speed pool pumps: try putting the pump speed up a notch
- Check for any clogs or backups causing poor water circulation
AquaComfort heat pump error codes HP, HPS, H3
HP, HPS, H3
What it means: high-pressure sensor in refrigerant system may be open (H3 means the “HP” error was triggered three times)
How to fix it:
- Use the FLO error code troubleshooting steps
- Recalibrate your water pressure switch
- Hire a pool heater repair technician to fix the problem, or replace the part
AquaComfort heat pump error codes LP, LPS, LP3
LP, LPS, LP3
What it means: low-pressure sensor in the refrigerant system may be open. Possible causes included a dirty evaporator coil or defective fan motor.
How to fix it:
- Try HP error code troubleshooting steps
- Replace or repair faulty low-pressure switch
AquaComfort heat pump error codes PO, Pc, tSO | HC, tSS
PO, Pc, tSO | HC, tSS
What it means:
PO, Pc, tSO: the water thermistor/temperature sensor may be open or disconnected
HC, tSS: possible closed water thermistor/temperature sensor or incorrect wiring
How to fix it:
- Call a pool heat pump repair tech to inspect the sensor for damage replacement.
- Try over-the-phone, DIY pool heater troubleshooting
AquaComfort heat pump error code DEF
DEF, FS
What it means: the heat pump is doing a normal defrost cycle
How to fix it:
- Reset heat pump: Turn off power at the breaker, wait a few minutes, then turn power back on
AquaComfort heat pump error codes Dc | dO
Dc | dO
What it means:
Dc: the defrost sensor may be open or loose
dO: possible closed defrost sensor or incorrect wiring
How to fix it:
- Call a pool heater repair technician to inspect the sensor, and replace if defective
- Perform the repair with help from a pool heater troubleshooting service
AquaComfort heat pump error codes ESO, dPO | ESS, dPC
ESO, dPO | ESS, dPC
What it means: the evaporator temperature sensor may be open or disconnected (ESS, dPC: evaporator temperature sensor shorted)
How to fix it:
- Seek professional pool heat pump repair technician to check for a defective sensor or faulty wiring
AquaComfort heat pump error code bO
bO
What it means: low supply voltage to the heat pump
How to fix it:
- Check that power is on at the breaker
- Visually inspect the heater’s electrical wiring for damage
- Seek professional pool heat pump repair
AquaComfort heat pump error code SPi
SPi
What it means: possibly defective controller
How to fix it:
- Power down and restart
- If error persists, replace controller
