Micro Thermostat Wiring Diagram. These two connections will ensure that there is power to the thermostat that you are. The thermostat uses 1 wire to control each of your hvac systems primary functions such as heating cooling fan etc.
Goodman phk024 1f wiring diagrams in 2021 thermostat wiring trane heat pump carrier heat pump. By contrast here is a thermostat that is being powered with the furnace transformer with a c wire or c wire adapter. As shown in the diagram you will need to power up the thermostat and the 24v ac power is connected to the r and c terminals.
These two connections will ensure that there is power to the thermostat that you are.
The thermostat uses 1 wire to control each of your hvac systems primary functions such as heating cooling fan etc. Please choose a year from the menu at left to start your search. Your system likely only has one transformer as most typical residential systems only use a single transformer for. Image 889669 715 kb.