Miller
Draft Established but No Gas Flow
Furnace inducer motor runs but burners do not light and there is a noticeable draft noise.
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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, Broken gas valve wiring, Control board not sending signal to gas valve, Manual gas valve closed
How to Fix / Troubleshooting
Safety: Turn off gas and power before working on gas components. Gas work should comply with local codes.
- Verify manual gas valve: Ensure the shutoff valve near the furnace is fully open.
- Check wiring to gas valve: Inspect the 24V wires to the gas valve for breaks or loose connections. Repair as needed.
- Measure valve voltage: During ignition, use a multimeter to check for 24V at the gas valve terminals. If voltage is present but no gas flow, replace the gas valve. If no voltage, suspect the control board or safety circuit.
- Confirm safety switches: Ensure pressure switch and limits are closed; an open safety will prevent gas valve activation.
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Repair Difficulty
Hard
4/5
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