DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Electrical (http://www.diychatroom.com/f18/)
-   -   home gas furnace problems (http://www.diychatroom.com/f18/home-gas-furnace-problems-166544/)

debd 12-15-2012 03:26 PM

home gas furnace problems
 
In a home gas furnace sometimes the igniter glows and the gas kicks in the furnace igniting . Sometimes the igniter wont glow at all the furnace not starting. I have replace the electrical circuit panel/board and I have replaced the igniter. Why isn't the igniter glowing every time?

danpik 12-15-2012 04:09 PM

Is the draft inducer motor starting? If it is the pressure switch connected to it with a small vacuume tube may be bad. The ports on it also may be clogged. Next time the furnace won't start check to see if there is 24 volts on both sides of the switch on the pressure switch. Check this to ground. Sounds like this might be the problem.

Stubbie 12-15-2012 10:58 PM

Quote:

Originally Posted by debd (Post 1073610)
In a home gas furnace sometimes the igniter glows and the gas kicks in the furnace igniting . Sometimes the igniter wont glow at all the furnace not starting. I have replace the electrical circuit panel/board and I have replaced the igniter. Why isn't the igniter glowing every time?

Because something is telling the control board to not allow the igniter to light the gas and probably not allowing the gas to flow either.

What is the make and model of your furnace?

debd 12-16-2012 02:48 PM

Goodman
GDS 80703AXBB

debd 12-16-2012 03:25 PM

Quote:

Originally Posted by danpik (Post 1073639)
Is the draft inducer motor starting? If it is the pressure switch connected to it with a small vacuume tube may be bad. The ports on it also may be clogged. Next time the furnace won't start check to see if there is 24 volts on both sides of the switch on the pressure switch. Check this to ground. Sounds like this might be the problem.

Yes, both post show full current. Does this mean the pressure switch is good or is there a change it is still bad?

danpik 12-16-2012 04:16 PM

Quote:

Originally Posted by debd (Post 1074179)
Yes, both post show full current. Does this mean the pressure switch is good or is there a change it is still bad?

What voltage did you see when you tested?

debd 12-16-2012 04:31 PM

Quote:

Originally Posted by danpik (Post 1074196)
What voltage did you see when you tested?

Its reading 20 volts

danpik 12-16-2012 06:42 PM

Quote:

Originally Posted by debd (Post 1074204)
Its reading 20 volts

Have you been able to get a reading when the furnace does not lite? 20 is a little on the low side but should work. Idealy 24+ is better.

NiNe O 12-16-2012 07:07 PM

20 volts is not enough, check the voltage across the pressure switch during the start of the heating cycle, should be 0, switch is closed, 24 and switch is open.

debd 12-21-2012 04:35 PM

Quote:

Originally Posted by NiNe O (Post 1074295)
20 volts is not enough, check the voltage across the pressure switch during the start of the heating cycle, should be 0, switch is closed, 24 and switch is open.

Got a more accurate reading, it is 25. When the switch was replaced it was replaced with a generic brand. Currently waiting for a brand name to come in. Hoping that that is the problem.


All times are GMT -5. The time now is 04:49 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved