Heliocol
Excessive Suction Head or Improper Solar Plumbing Layout
Pool pump loses prime or cavitates when solar turns on; visible air in pump basket.
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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
Solar feed taken from suction side instead of pressure side, Excessive vertical lift to Heliocol array, Undersized suction piping, Air leak on suction line exacerbated by solar demand
How to Fix / Troubleshooting
Safety first: Turn off pump before working on plumbing. Do not run pump dry.
- Verify plumbing configuration: Ensure the solar feed is connected on the pressure side after the filter, not on the suction side of the pump.
- Check for suction leaks: Inspect and seal all suction-side joints, pump lid, and valves to eliminate air ingress.
- Adjust pump speed: Increase pump speed when solar is active to maintain prime, within the pump’s safe operating range.
- Consult installer: If the vertical lift to the Heliocol array is extreme, consult a professional about reconfiguring plumbing or upgrading the pump.
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Repair Difficulty
Hard
4/5
Required Part
Pool Circulation Pump
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