SPRSUN Excessive Hydraulic Resistance

Heater operates but causes noticeable drop in water pressure or flow to pool returns.

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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

Internal blockage in titanium heat exchanger, Undersized plumbing or too many fittings, Partially closed valves around heater, Debris caught in heater inlet strainer (if equipped)

How to Fix / Troubleshooting

Safety first: Turn off power and close valves before disassembling any plumbing.

  • Check valves: Ensure all inlet/outlet valves to the SPRSUN heater are fully open and that any bypass is correctly adjusted.
  • Clean strainers: If your installation includes a strainer or filter before the heater, clean it thoroughly.
  • Inspect plumbing layout: Look for unnecessary elbows or restrictions that could be reconfigured by a pool professional.
  • Heat exchanger cleaning: If blockage inside the heat exchanger is suspected (e.g., from scale or debris), a technician should perform a chemical flush following SPRSUN guidelines.
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Repair Difficulty

Hard 4/5

Required Part

Titanium Heat Exchanger
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