Poolworld Excessive Hydraulic Restriction

Heater causes noticeable drop in water flow or pressure when it runs

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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 scaling in heat exchanger, Partially closed valves, Undersized plumbing, Debris caught in heater inlet screen (if equipped)

How to Fix / Troubleshooting

Safety first: Turn OFF power and pump before opening any plumbing connections.

  • Check valves: Ensure all valves before and after the heater are fully open.
  • Inspect inlet screen: If your Poolworld model has an inlet strainer or screen, remove and clean it.
  • Evaluate plumbing size: Confirm that the pipe size to and from the heater matches Poolworld recommendations.
  • Descale heat exchanger: If restriction is suspected from scale, have a professional perform a chemical cleaning.

Note: Excessive restriction can stress the pump and reduce heating efficiency.

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Repair Difficulty

Hard 4/5

Required Part

Heat Exchanger
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