10
Immergas
General Electronic Board Fault
Furnace shows 10, no heating or DHW, may occur after power surge
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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
Internal failure of main control PCB, Burnt components due to surge, Corrupted firmware
How to Fix / Troubleshooting
Safety: Disconnect power before accessing the PCB. Electronic repairs should only be done by qualified personnel.
Steps:
- 1. Power reset: Turn off the main switch or breaker for 1–2 minutes, then restore power. If code 10 returns immediately, the board is likely faulty.
- 2. Visual inspection: Remove the front cover and inspect the PCB for burnt marks, swollen capacitors, or water damage. Check that all connectors are firmly seated.
- 3. Surge protection: If the fault followed a lightning storm or power event, consider installing a surge protector when replacing the board.
- 4. Board replacement (technician): The main PCB must be replaced with the correct Immergas spare part and configured (gas type, power, parameters) according to the service manual.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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