I've got a Goodman Furnace, Model # GMS90703BXA. It stopped igniting on Sunday (giving 3 blinking lights, pressure switch stuck open) so I called a 24/7 HVAC line to have someone come out, they said to try blowing in and out on the hoses of the 2 different pressure switches, then turn it on, sometimes it can knock debris free, well that did the trick.
Fast forward to today, same issue, it took a few more tries, but sure enough it ignited and I'm in business once again.
Now I'm not sure if this means my pressure switch is dying and needs to be replaced (there's 2 of them, so not sure which one is the issue) or something else that my unskilled mind isn't aware of.
I see I can get the pressure switch for $20 USD on amazon, does it sound like I should just be replacing these and seeing if that fixes it?
My dad is an HVAC guy, but is on a cruise for another week (of course that's when my furnace goes down).
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