was wanting help with a heating and air unit, the pilot on the heater is working, its a gas unit inside the house with the ac outside. Central heat has been working up to this point this season, but stopped working yesterday. As I said, the pilot light is on, but the main burners do not turn on even thought it is cold enough, and the fan does not turn on regardless of the thermostat position, I have tried it on auto/heat, auto/cool (the ac unit outside did turn on, but still no fan) and I have tried it with the fan set to the on position, still nothing.
I found the posting:
Central Air Blower Fan won't start
Started by matty1stop, Jun 09 2011 09:07 PM
This was great and I followed the post down to where ACtechGUY suggested putting a jumper wire between R and G. After I put on the jumper wire, now when I set the fan to the on position, it does turn on, but it still will not turn on in the auto position, even though now with the jumper in place the main heat burners do turn off and on depending on where I position the thermostat temp.
So now if I were to leave it on auto heat, the main burners would use a lot of gas and send a lot of heat out the flue. But if I switch the fan to on, and turn the thermostat up, I can manually control my central heat, but to get the burners to turn off I need to switch the heat/air/off to off, and the fan back over to auto to get the fan to switch off.
Hope that wasn't too much information, in short I need to know what to do next, in the thread I found, there was a different outcome after the jumper was placed, so I have no guidance as to what I should do next, ie does this tell you what is wrong with my central heat and air unit and is it simple enough for a skilled do it yourselfer, or should I call an hvac guy?