Furnace: Igniter glows, but no pilot

[HenryA888]

My furnace's igniter glows brightly but the pilot does no light, any ideas why? This was working a week ago.

[Tony Hwang]

Hi, Your furnace has ignitor and pilot? Are you trying to say ignitor works but no flame? THen gas valve is not opening or you don't have gas supply.

[hvactech2]

The fact that you have a 'Hot surface ignitor" tells me that you don't even have a pilot on your furnace. This also means that you don't have any idea what you are looking at. you really need to call someone who knows what they are doing.

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[Joseph Meehan]

If the igniter glows and the gas does not come on, it likely means the flame sensor is out.

[Puddin' Man]

The glow igniter functions as your pilot.

The sequence on modern furnace:

1.) igniter glows 2.) gas is fed to fire main burners 3.) flame sensor heats and "keeps main burners burning"

First power furnace off for a few seconds and back on.

Check to see if your 10-yr-old or somesuch closed the gas valve exterior to the furnace.

Listen very carefully as igniter starts to glow. Do you hear the gas being fed to the main burners? An audible hiss ...

If not, you -could- have a gas valve problem. Check wiring, etc.

If so, and the burners don't fire at all, you -could- have a problem with the glow igniter.

If the burners fire, but go out in a few seconds, you

-may- need to remove and clean the flame sensor.

Hope it hep's ...

Cheers, Puddin'

[HeatMan]

Smart Valve maybe?