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ratzil63 · Feb 19, 2008, 01:07 PM

Hi, my name is mo from Arizona, my Goodman Model PGB furnace would not light. Pulled out the spark ignitor, flame sensor, ckecked voltage at gas valve, pulled out fuse, all of these parts looked and checked out OK. Turned the power on and the furnace worked fine. Remembering the LED was blinking 2 flashes, checked the trouble chart that said end switch open and repair Venter end switch. What should I do now, go buy a new Venter switch or forget about it till it quits the next time. It will be summer soon although the house cools off to about 60 F at night with no furnace. Any help would be appreciated and thanks for reading this. Mo

hvac1000 · Feb 19, 2008, 05:07 PM

Originally Posted by ratzil63

Hi, my name is mo from Arizona, my Goodman Model PGB furnace would not light. Pulled out the spark ignitor, flame sensor, ckecked voltage at gas valve, pulled out fuse, all of these parts looked and checked out OK. Turned the power on and the furnace worked fine. Remembering the LED was blinking 2 flashes, checked the trouble chart that said end switch open and repair Venter end switch. What should I do now, go buy a new Venter switch or forget about it till it quits the next time. It will be summer soon although the house cools off to about 60 F at night with no furnace. Any help would be appreciated and thanks for reading this. Mo

See here

ratzil63 · Feb 21, 2008, 07:09 AM

hvac1000, thanks for the link, you are right, check the venter end switch which I can not find. Furnace still working good. Mo

hvac1000 · Feb 21, 2008, 09:06 AM

It is the switch on the end of the vent motor. That is the little blower motor in front of the unit. Page 12 look at ES and VM for your answer.

http://site.famousparts.com/goodman/IO-148.pdf

T-Top · Feb 21, 2008, 07:25 PM

The next thing to check is why did the vent limit switch trip. High winds in the area, restricted vent?

PGB048075 · Mar 12, 2011, 08:56 PM

Goodman Furnace model PGB048075-1
Is it possible that a bad high limit switch that causes the fan to constantly blow whenever power is applied. The coil was clog and air couldn't get through. I cleaned the coil and now I want to turn the furnace back on and see if it trips the limit switch now. Could you tell me how to turn the unit back on, cause our thermostat inside is not on unless the unit is on.