E15
Chaffoteaux
Gas Valve Control Fault
Furnace shows E15, may be related to gas valve or modulation control.
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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
Faulty gas valve coil, Loose gas valve connector, Control board output failure, Short circuit in gas valve wiring
How to Fix / Troubleshooting
Safety: Turn off gas and power. Only qualified gas engineers should work on gas valves.
- Visual inspection: Check the gas valve body and connections for signs of overheating, burning, or water ingress.
- Check wiring: Ensure the multi-pin connector to the gas valve is fully engaged and that the cable is not damaged or pinched.
- Do not adjust: Do not attempt to adjust gas valve screws or regulators. Incorrect settings can be dangerous.
- Reset: Restore power and reset the furnace. If E15 returns, a professional must test the gas valve coils and control board outputs and replace components as needed.
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Repair Difficulty
Professional Required
5/5
Required Part
Gas Valve Assembly
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