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PDC Spas No temperature data / communication fault between topside and control pack

Display shows dashes or blank segments instead of temperature; spa may not respond.

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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

Loose ribbon cable between PDC Spas topside panel and control pack, Water intrusion into topside control, Failed display or keypad, Control board communication circuit fault

How to Fix / Troubleshooting

Safety first: Turn off power at the GFCI breaker before removing the topside panel or opening the control pack.

  • 1. Inspect topside cable: Access the underside of the topside control panel (usually from inside the equipment bay). Verify the ribbon cable is firmly plugged into both the panel and the control board.
  • 2. Check for moisture: Look for condensation or water inside the topside housing. If present, carefully dry the area and allow the panel to air out before restoring power.
  • 3. Power reset: After reseating the cable, restore power and see if the display returns to normal.
  • 4. Substitute panel (if available): If you have access to a known-good PDC Spas-compatible topside, connect it temporarily to see if the issue is with the panel or the control board.

If the display remains blank or shows only dashes with a known-good panel, the control pack likely has a communication or display driver fault and should be serviced or replaced by a professional.

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Repair Difficulty

Hard 4/5

Required Part

PDC Spas topside control panel
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