Day & Night No Gas Flow / Ignition Failure

Furnace ignitor glows but burners do not light; a faint gas smell may be present near the furnace.

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

Failed gas valve, plugged burner orifices, gas supply shut off upstream, low inlet gas pressure

Critical safety: If you smell gas strongly, shut off gas at the main valve, evacuate, and call your gas utility.

Check manual shutoff: Confirm the gas cock near the furnace is open.
Observe ignition: If the ignitor glows and you hear the gas valve click but no flame appears, burners or orifices may be blocked.
Do not repeatedly cycle: Avoid repeated ignition attempts that can accumulate unburned gas.

Gas valve and burner cleaning should be performed by a licensed technician with proper combustion testing equipment.

Professional Required 5/5

Gas Valve Assembly

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