Lennox
No Gas Flow to Burners
Furnace inducer motor runs but burners never light; you hear clicking or see ignitor glow but no flame.
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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
Closed manual gas valve, Faulty gas valve coil, Broken gas valve wiring, Tripped rollout or limit switch preventing gas valve operation
How to Fix / Troubleshooting
Danger: Gas diagnostics should be done by a professional. If you smell gas, evacuate.
- 1. Verify gas valve position: Ensure the handle is parallel to the pipe (open).
- 2. Check safety switches: Some rollout switches have manual reset buttons; if tripped, reset once only and monitor closely.
Further testing of gas valve voltage and pressure must be done by a licensed technician.
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Repair Difficulty
Professional Required
5/5
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