Originally Posted by Marbledust
trace your wires back to the transformer/find 24v and common....B maybe common
I am rewiring the whole thing . A short was found in the thermostat wire so it's been replaced . I think there is a second fault in the wire leading to the heat pump because now my new transformer has died . All this without the heat pump ever turning on . If you look at the picture i posted with the thread it shows c as common on the air handler . After some looking around i see that for york units B is common so i c is connected to b. My current thinking is issues are all related to shorts in wires. If you have any other idea's let me know and if issues still persist i will try them.
Thanks for all the help so far.