AquaCal
No Power to AquaCal Heater
Heater will not start at all; display is blank or dim.
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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 line voltage connections, Failed main contactor or transformer
How to Fix / Troubleshooting
Safety first: This involves high voltage. If you are not experienced, contact a qualified technician.
- Check breaker and disconnect: Verify the dedicated breaker for the AquaCal unit is ON and that any outdoor disconnect is engaged.
- Inspect wiring: With power off, open the electrical compartment and check for loose or disconnected wires at the terminal block and contactor.
- Internal fuse: Many AquaCal boards have a low‑voltage fuse. Inspect and replace with the same type and rating if blown.
- Transformer test: A technician should verify that the control transformer is providing the correct low voltage to the board.
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Repair Difficulty
Hard
4/5
Required Part
Control Transformer
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