Question about Fasco Heating & Cooling
When it calls for heat, it doesn't always lite. When it doesn't, combustion blower stays running until I turn furnace off and try and restart it. Sometimes it starts and then it may not. I am not sure if the ignition module is bad or the high pressure switch. All I know is that it is not getting the gas to ignite at all times.
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Posted on Jan 02, 2017
SOURCE: armstrong ultra sx 80 furnace
You have a dirty flame sensor. Look at the very last burner and you will see a wire going to a ceramic sensor and it looks like a thick wire. Take some steel wool or fine sandpaper and clean the surface off and it will work like a champ.
Let me know how it goes ken
Posted on Apr 15, 2009
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