Hayward
No Power to Heater
Heater will not start at all; display is blank and no lights or sounds are present.
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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
Tripped circuit breaker, Blown internal fuse on control board, Loose power wiring at terminal block, Faulty power switch
How to Fix / Troubleshooting
Safety First: Use caution when working around live electrical circuits. Turn off the breaker before opening the electrical compartment.
- Check breaker: Verify the dedicated heater breaker in the panel is ON and not tripped. Reset if necessary.
- Inspect power connections: Remove the heater's electrical access cover and confirm that line wires are tight at the terminal block.
- Check internal fuse: Many Hayward heaters have a low-voltage fuse on the control board. With power off, remove and inspect the fuse. Replace with the same type and rating if blown.
- Test power switch: If equipped with an on/off switch, verify continuity through the switch when ON. Replace if defective.
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Repair Difficulty
Medium
3/5
Required Part
Control Board Fuse
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