Question about Heating & Cooling
I have a coleman furnace (model # G8T08012UHA11A). The blower is running when I turn on the furnace, but will not create any heat. I replaced the hot surface ignitor yesterday, but am still having the same issue. The status light is blinking a steady green only once.
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Posted on Jan 02, 2017
Rmove the two screws holding the blower in place and slide it out. With the power off, rotate the wheel and inspect for debris or an impingement. If everything turns easy, you have a bad motor or start capacitor. If you have rubbing, adjust the wheel. If the motor will not turn, replace it.
Posted on May 30, 2008
I have a goodman GMP075-3 that won't turn on. I think it is the pressure switch since I do not have a vent blockage. What is a venter and where can I find it??
Posted on Dec 30, 2008
You have a limit switch located in the furnace (a little bigger than a dime and located near the center of the front panel, sometimes the switch is mounted to a small fiberglass board) . There will be two wires going to it. They sometimes trip so often that they fail to automatically reset(due to dirty filters or undersized ductwork). You can SHUT OFF POWER TO THE FURNACE, then remove the two screws holding the switch in the furnace, pull the switch out of the furnace and tap on it and wipe it off.
The switch may work a few more times but should be replaced with the same size and type. You will see some rating printed on the switch somewhere. Write down all the numbers and get a replacemet from a furnace/AC supply house. If you have a meter and know how to use it you could check the switch for continuity.
Sometimes just a tap on the switch will get it going. There will also be a couple of rollout switches that could be tripped. They have little buttons on them to reset them. If they trip it may have other issues to be solved.
Hope this helps!
Posted on Feb 01, 2009
I will try to help. Your furnace has to have a good ground before the igniter will work. The draft fan starts purges for a few seconds and the ignitor is supposed to come on. If not check to see if the contacts on the air switch on draft motor are closing. If you ahve changed the ignitor that is not your problem. Another possible problem is the baord that feeds the ignitor. But check the air switch first Rus. Keep in touch.
Posted on Nov 19, 2009
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