Jandy No Power to Heater

Heater will not start at all; no display, no lights, no blower.

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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, Loose power wiring at terminal block, Failed transformer

How to Fix / Troubleshooting

Safety first: Turn off the breaker before opening the electrical compartment.

  • Check breaker: Verify the heater's dedicated breaker is ON and not tripped. Reset if necessary.
  • Inspect power connections: Remove the access panel and check the line voltage connections at the heater's terminal block for tightness and signs of overheating.
  • Internal fuse: Locate and check any internal fuses on the control board or power entry. Replace only with the same type and rating.
  • Transformer check: If line voltage is present but the display is dead, the low-voltage transformer may have failed and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Power Transformer
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