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Coleman 7900 - Burner problem? Clicks on and off
Posted: Mon Nov 22, 2010 11:28 am
by todd_s
I have a 7900 series, Coleman, 1986.
My burner will not stay on for extended period of time, it clicks off and on. I have no idea where this Heat sensor is, if this furnace even has this one. I keep being told that it might be that, but I haven't a clue where it is located.
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Tue Nov 23, 2010 1:50 am
by Robert
Check your burner tube and burner orifice/spud behind the gas valve for blockages (spider-web-bugs).
Thanks,
Robert
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Wed Nov 24, 2010 1:33 pm
by todd_s
This is the burner tube, correct? I have cleaned this.
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Thu Nov 25, 2010 3:33 am
by Robert
No, burner tube or burner venturi is behind gas valve and is where burner flame comes from.
May be best to call an hvac tech to resolve this issue.
Thanks,
Robert
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Thu Nov 25, 2010 11:01 am
by todd_s
Do you have an idea how much it would cost for something like that? Just a ballpark?
Thanks..
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Fri Nov 26, 2010 1:19 pm
by Robert
Depends on who you call. Charges vary widely from one company to the next.
IF I came out and it was ONLY a dirty/clogged burner and/or burner orifice, it would be $75.00 .
Thanks,
Robert
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Mon Nov 29, 2010 1:20 pm
by todd_s
I've tried everything. Could it be the burner limit switch? That's the only thing I can think of.
or any of the switches?
Re: Coleman 7900 - Burner problem? Clicks on and off
Posted: Mon Nov 29, 2010 5:15 pm
by Robert
Yes, an intermittent problem with limit switch could cause this problem. Test them to see if they are opening.
Thanks,
Robert