Dreaded EE code
Hello all, I need help with Ac. I have the 5 button duotherm. I have replaced the thermostat, one communication cable that was bad and the control board. Actually two of them. I have tested both co...
Forum Discussion
Plug the tstat into P2 and unplug the Zone 2 comm cable. You CANNOT clean the small pins in a Phone type connection if corroded. If you go to the bedroom Control board you will see Zone 2 DIP switch ON. What you can do is easy if the P1 is bad. SWAP the front and rear control boards. Put the NOW Bedroom Control board to Zone 2 and the furnace ON. Put the now front control board to Zone 2 OFF. You should now have the P1 and P2 operational and connect the bedroom Zone 2 COMM cable to the working P2 of the old front zone board. Doug
