AquaCal Overheating Electrical or Chemical Off‑gassing

Strong chemical or burning smell around the heater during operation.

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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

Overheated wiring or contactor, Debris on electric heater elements (if hybrid model), Pool chemicals stored too close to unit, Insulation or plastic components overheating

How to Fix / Troubleshooting

Safety first: If you smell burning plastic or see smoke, shut off power immediately at the breaker and do not restart until inspected.

  • Inspect surroundings: Ensure no pool chemicals (chlorine, acid) are stored near the heater intake or exhaust. Relocate them.
  • Open access panel: With power off, inspect wiring, contactors, and the control board for signs of overheating or charring.
  • Remove debris: Clear any leaves or plastic bags that may have been drawn against hot components.
  • Professional inspection: If any components appear burnt or melted, have an AquaCal technician replace the damaged parts and verify safe operation.
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Repair Difficulty

Hard 4/5

Required Part

Main Contactor
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