Lennox Gas Furnace Wiring Diagram G. Most heat pumps include second stage heating and require the white w2. The second wiring diagram showing a heat pump system.
The furnace fires but the blower motor wont come on in either auto or run. However it looks like the previous owner added ac and added in a fan relay switch along with a 4 wire tstat. Connect wiring between thermostat indoor unit and outdoor unit as shown in the appropriate wiring diagram.
Where is the fuse on a trane furnace.
Payne 45 found that implementing. You should be aware that this may have changed especially if the person who wired the thermostat didnt use conventional color coding. Payne 45 found that implementing. With the top thermostat wiring diagram showing an air conditioning system.