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Surge Damage / Intermittent Control Fault
Boiler frequently goes to lockout with random error codes after lightning or power surges
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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
Damaged main PCB, Partially failed power supply, Corrupted firmware, Grounding issues
How to Fix / Troubleshooting
Safety first: Turn off power before inspecting electrical components. Only qualified persons should test live circuits.
- Step 1 – Inspect for visible damage: Remove the PCB cover and look for burn marks, swollen capacitors, or melted traces.
- Step 2 – Check grounding: Ensure the boiler's ground wire is securely connected to the building ground.
- Step 3 – Install surge protection: Have a licensed electrician install a surge protector on the boiler circuit to prevent future damage.
- Step 4 – Replace PCB if needed: If random lockouts continue, the main PCB or power supply module likely needs replacement.
Document error codes and conditions before power cycling to assist the technician in diagnosis.
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Repair Difficulty
Professional Required
5/5
Required Part
Main PCB (Control Board)
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