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Did you replace the thermostat in response to this or, the problem came afterward ?
Ok disconnect the yellow wire off the furnace, its on the circuit board on the y terminal, let me know, ya got a wire crossed somewhere hopefully its for the air conditioning and not the furnace,
Is there no cooling attached ?
Furnace, Y terminal if there is a wire on it,
I have 3 cables into the circuit board of the furnance. Each has a red and white wire. One is attached to the G and Y/Y2 spots. One is attached to the Com24V and Y/Y2 spots. And one is attached to the W and R spots. However, I only have two cables, each with a red and white wire coming into the thermostat. So I have one cable to the Rh(jumpered to the Rc spot) and W. The other cable is to the G and Y spot.
I disconnected the white wires at the furnace Y/Y2 spot and still got the same LED code. It must be how I attached the wires to the thermostat, right?
Probably but its easier to figure it out at the furnace if you remove all the wires except the ones on W and R and see if the unit will work,
Ok take them off also then,
That's not good , without any wires on you are getting the shorted fault ? If so you will end up replacing the circuit board.
yes, without wires on it there isn't much more to check, it has 24 volts and you didn't do anything to switch the polarity on it and it gives you a shorted code, it sure sounds like its dead.