Hi Guys!
Here is a little background. At the start of the winter season, the furnace had blown intermittantly warm and then would short cycle blowing cold until shut off at the switch. When it would blow warm it would go through a normal cycle of induction, preheat, then blow, gas off then blow till cooled down. then a few minutes later it would short cycle till i got tired of hearing it kick on and off.
![Evil or Very Mad :evil:](./images/smilies/icon_evil.gif)
I had also noticed that for a time it had a no call for heat error. Figuring it was the board after some testing I resigned to tinker some more before pulling it and sending it to you for repair. After thirteen years iIm kinda getting good at it, I have to put a new one in every other year or so. Yesterday i thought I would try cleaning the board with electrical componant cleaner because I noticed some areas where dust had accumulated around some traces underneath from static and might be causing a short. low and behold it worked. Normal operation and no error flash. While I was tinkering though I had removed the A/C sending wires too. If I reconnect them, it doesn't flash a code but starts short cycling again. Here is the clincher. I had replaced the thermostat. Changing the wires to the new matching the colors as best I could. As long as I have the A/C sending wires disconected, the furnace now works fine. So I believe that the wiring at this point is messed up. So I need some help with the wiring to make sure it is correct. Here is the wiring pattern. From thermostat to controller the wires are blue green white red yellow. from ac condensor red and white.
from therm--> B G W R Y so BW GG WC RR YY
at controller--> W G C R Y these are the connections at controller
from cond --> W R so WC YR
at Therm B O Y G W RC-RH RCRH are jumpered
Y G B R so YY GG WB RCRHandR
With the heat working fine I guess that the wiring for the A/C is the culprit. Right now the white wires are disconnected at both therm and controller but red is still connected to R on controller. I hope that is enough info to help me im getting frustrated with this whole mess
![Smile :)](./images/smilies/icon_smile.gif)