[Denny and Angie Miller]

Thank you DQDick for explaining the control signal flow path. For troubleshooting purposes, can i switch my bedroom tstat and the main unit tstat? Main unit has heat pump while 2nd unit does not. 2nd unit tstat doesnt have a heat pump mode of operation (cant remember if it has heat mode or not). I realize I would likely lose all heat operation by doing this, but my problem has been with A/C. By doing this I would think I could at least determine if tstat is, or is not my issue?