Not really a repair but an upgrade. I want to replace the existing Honeywell LR1620 thermostat on my heating/AC system, one transformer, to one of those new electronic automatic setback ones.
The old thermostat has connections lettered R,G, Y and W with appropriately colored wires going to them (red to R,etc) The new one has terminals also lettered G,Y, W and an RH and RC. It came with the RH and RC already jumpered together. Is it just a matter of transferring the wire on the same letter terminal from the old one to the new one,or is there some catch?