Furnace shows E10, unit does not start, may be accompanied by no fan operation.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Switch off the circuit breaker before removing the electrical cover.
Steps:
- Check mains supply: Confirm that other appliances on the same circuit are working correctly. If lights dim or flicker, contact an electrician.
- Inspect power terminals: Open the electrical junction box on the furnace and verify that the live, neutral, and earth connections are tight and not discolored.
- Check main fuse: Locate the main fuse on or near the Cointra control board. Replace only with the specified type and rating if blown.
Professional help: If E10 persists with correct supply voltage, the internal power supply section of the control board may be defective and should be replaced by an authorized service technician.
Repair Difficulty
Required Part
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