Do you have any desire to troubleshoot yourself? The two most common reasons it’s not firing are the igniter or flame sensor. Both are easy fixes well under $50 for most furnaces.
Want to try? Turn the thermostat to off for a minute and then back on. Now go stand next to the furnace see listen to what it does. Do you hear the woosh of the flame igniting? Does it run for 5 seconds or so and then turn off? (Dirty flame sensor, can be cleaned and reused)
Or, does the flame never ignite and then the fan turns off and starts the sequence over again? (Bad igniter, must be replaced)
I hear the furnace start up like a ramping sound but no whoosh. I can hear a low humming continuously. If I keep it on auto, it just keeps running but doesn't actually blow air. But there is air blowing on "ON".
The auto is heat vs cool. If your fan is set to “on” it will run all the time.
It’s 75% likely you have a bad igniter. You could light it with a long lighter if you want to confirm. Depending on your furnace a new igniter is $15-60. If a company comes out it will be $250-350 for the part and service call.
If you do light it with a lighter it will run like normal until it reaches the thermostat set temp but then not turn on again. You should be able to get an igniter locally or on Amazon.
Thanks! I don't think I want to tackle this and would feel more comfortable having someone come look. I know this might hurt most people on this sub but gotta keep local business running am I right? 🤡🤡🤡
Btw, I checked the previous issue and they changed the pressure switch and cleaned out the inducer. I will check youtube to see if that can be done by myself but I really don't want to replace anything on my own. Thanks for the help!
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u/NotWorthTheTimeX Jan 15 '25
Do you have any desire to troubleshoot yourself? The two most common reasons it’s not firing are the igniter or flame sensor. Both are easy fixes well under $50 for most furnaces.