This is how i have had it wired with the old control board and the new one except for the heat and cool not being on the heat/cool terminal, leaving the heat and cool termainals vacant. It worked fine when first installed and is working fine now, but after first installing the new board it started clicking and the motor jerked like it was getting a signal to turn off then back on. this happened after about 8 hrs or so of working correctly. I will give it another try.
Thanks, XXXXX XXXXX see how it works from here. I cannot check the on board relay so i will recheck the external realy. It does not have the terminals numbered but looking at an old one i have the wires are correct.
Thanks for your help.
Thanks for all your help. It looks like everything is wired correctly according to your drawing which corresponds with what came with the unit - except for one orange wire that is not hooked up in the thermostat and therefor does not go out to the compressor. It has been working like this for 18 years but i do not know why it was never hooked up.