First unplug your furnace to reset it then plug it back in with thermostat set to heat high enough to make the heat come on. As soon as the inducer motor came on you JUMP the 2 wires that go to pressure switch. Your igniter should come on and gas valve should open for heat. If the flame stay on the blower should come on after a few minutes. If it get to this point your problem could be pressure switch itself or inducer clogged.
The induced draft proving switch can fail , however it is far more common that the port on the induced draft assembly where the tubing for the pressure switch attaches has obstructed with carbom and must be cleared with a tiny drill bit or paper clip if nothing else is handy, this is a very common problem, if this orifice is not cleared every year you can count on this happening.
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SOURCE: no hot surface igniter
This is why swapping parts is never a good idea. It could be a board, pressure switch, or several other issues. I'm a service technician and realize that many furnace issues are difficult to diagnose over the phone, or internet.
Calling a qualified, NATE certified technician to diagnose and repair this properly is probably the best solution that I could suggest. Yes, there will be a bill and it will be expensive, but it will be a lot less so than changing out parts you might not need.
www.natex.org
SOURCE: pressure switch stuck open
It most likely is not stuck..... It is just doing its job. You "most likely" have over problems. To "properly" diagnos this problem you will need a manehelic gauge. You can have a wide variety of problems from as simple as a blocked or disconnected vacum hose to a lifetheatening problem.... a blocked flue pipe or a bad heatexchanger.
BE CAREFULL
GOOD LUCK!
SOURCE: I had a friend install my new Goodman GMH950704CX
The most common mistake on these after installation is not flipping the switch on the gas valve from 'off' to "On". Remove the top panel and in the middle of the cabinet the gas line comes into an aluminum looking device. There is a switch on top. If that is on, ensure that the gas has been turned back on.
SOURCE: Goodman GDS80904BNA LED Blinks 3 Times
had similar problems with same furnace. I think the 3 blinks is high limit event. either way with the power off to the furnace remove the board from the 4 clips holding it on one at a time then turn it over and look at it you will be able to tell if the board is bad because it will appear scortched and the resin will be bubbled up where it went bad. replace board and you will be fine. went through 2 in 2 years all of a sudden they are being made by a different company from the original and the 1st replacement. now all is fine. Take a good picture of the board close up so you can reconnect all the wires properly. Friend of mine got it from a wholesaler for $55.00
Testimonial: "The circuit board was definately the problem. Got it replace (still under warranty) with an updated board and everything is working great. Thanks!"
SOURCE: Goodman GS9 propane furnace inducer motor runs continuously
it sounds like the low temp limit switch, the one that cools the furnace down with the burner off and the thermostat open, when it cools to a point the fan stops, the other switch in burner area turns burner off/on, hope this helps
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