Caldera Spas No Power / Dead Spa

Spa will not turn on at all; no lights on topside control, no pump activity.

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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 GFCI breaker, Blown main fuse on IQ control board, Loose power connections in control box, Failed IQ control board power supply

How to Fix / Troubleshooting

Safety first: Only work on live electrical components if you are qualified. Otherwise, limit yourself to visual checks and breaker resets.

  • Check GFCI: Locate the spa’s GFCI breaker or disconnect. Reset it fully OFF then ON. If it trips immediately, see the GFCI TRIP scenario.
  • Verify supply power: Confirm that the spa is receiving the correct voltage at the disconnect (240V or 120V depending on configuration).
  • Inspect control box: With power off, open the IQ control box and check for burned components or loose wires at the terminal block.
  • Check fuses: Many Caldera control boards have onboard fuses. Inspect and replace any blown fuses with identical ratings.

If the spa remains dead after these checks, the IQ control board may need replacement by a professional.

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Repair Difficulty

Professional Required 5/5

Required Part

IQ Control Board
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