SPRSUN
Insufficient Heating Capacity / Performance Degradation
Pool heater runs but water does not reach set temperature; very slow heating performance.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Dirty evaporator coil reducing heat absorption, Low refrigerant charge, Incorrect water flow rate (too high or too low), Ambient temperature too low for selected mode
How to Fix / Troubleshooting
Safety first: Turn off power before cleaning or opening panels.
- Verify setpoint and mode: Check that the SPRSUN controller is set to the correct heating mode and that the target temperature is above current pool temperature.
- Check ambient conditions: Heat pumps deliver less capacity in cold weather. Compare performance to the specifications for your model at current outdoor temperature.
- Clean coils: Gently wash the evaporator coil and condenser surfaces to remove dirt and debris that reduce efficiency.
- Optimize water flow: Adjust bypass valves so that the recommended flow rate passes through the heater. Too high a flow can reduce temperature rise per pass; too low can cause protection trips.
- Cover the pool: Use a pool cover to reduce heat loss, especially at night.
- Call a technician if needed: If performance remains poor, a professional should check refrigerant charge and system pressures.
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Repair Difficulty
Medium
3/5
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