I had that problem on my 02 Bounder. Zone one is the area where the thermostst is located. If the thermostst is located in the bedroom, then that is zone 1. On my ubit, the wiring was wrong. Zone 1 was actua;;y reading the temp. from Zone 2. I reversed the wiring and it works fine. The Zone wires are Blue and Blue/white. I cut the wires and used but connectors to attach the blue to blue/white and the blue/white to the blue. Now the zones reads correctly. It corrects the heating also.