— —
Caldera Spas
Topside Control Communication Failure
Display shows dashes or is blank with only backlight; spa does not respond to button presses.
Advertisements
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.
Advertisements
Possible Causes
Loose or damaged topside control cable, Water intrusion into topside panel, Failed topside control, Faulty IQ control board communication port
How to Fix / Troubleshooting
Safety first: Turn off power at the GFCI breaker before handling control cables.
- Inspect topside cable: Access the equipment compartment and locate the cable from the topside panel to the IQ control box. Check for cuts, kinks, or rodent damage.
- Reseat connectors: Unplug the topside connector from the control board, inspect for corrosion, then firmly reconnect.
- Check for moisture: Inspect the topside panel for condensation or water under the overlay. If present, the panel may be shorting internally.
- Test with replacement panel: If available, connect a known-good Caldera-compatible topside panel to determine whether the issue is with the panel or the control board.
Control board communication faults typically require professional diagnosis and may necessitate IQ control board replacement.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Topside Control Panel
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements