E10
Roca Control Board Communication Fault

Furnace control panel unresponsive or shows communication error between display and main board

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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 low-voltage harness between user interface and main PCB, Faulty display module, Defective main control board, Electrical noise or surge damage

How to Fix / Troubleshooting

Safety first: Disconnect power before removing the front panel or control cover.

  • Inspect connectors: Locate the ribbon cable or multi-pin harness between the front display and the main control board. Unplug and replug both ends to ensure good contact.
  • Check for moisture: Look for signs of condensation or water ingress around the control area. Dry gently with a cloth and allow time for complete drying.
  • Visual board inspection: Examine the main PCB for burnt components, bulging capacitors, or darkened areas. If present, the board likely needs replacement.
  • Power cycle: Restore power and perform a full power cycle (off for 30 seconds, then on). If the error persists, one of the boards is defective.

Warning: Control board replacement involves handling static-sensitive electronics and mains voltages. If you are not experienced, contact a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board (PCB)
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