Trane 2-stage Heat and AC - proper wiring of Thermostat? I just had a Trane XV95-series furnace installed with a Trane XL18i Compressor/Condenser installed, and am concerned that the tech didn't hook things up properly, even though he insisted that he did when I called it to his attention. Based on my review of the manual, I don't believe it's done read morereddit/r/HVAC · Feb 26, 2016I think this is a good question. I am pretty sure he fulfilled his contact, and it will work fine. But I think having the thermostat control the stages is better if it can. When it 2 votesThat ac will not go into second stage. I know from the wiring diagram and 4 yrs of hvac experience. The furnace may have a jumper on the control board to force second stage after 2 votesWiring looks fine.
Furnace will fire to second stage after a delay if thermostat is not satisfied within that time frame. As far as the cooling goes i believe it is the same thing.1 voteI have the same problem. Can i get the correct wiring? units.
Many thanks1 voteSee allSee all comments Trane 2-stage Heat and AC - proper wiring of Thermostat? Feb 27, 2016Trane 2-stage Heat and AC - proper wiring of Thermostat? Wiring is: (T-Stat - Furnace) C - B/C. W - W1. Y - Y. RH (also jumpered to RC) - R. G - G. The Compressor/Condenser unit is connected to B/C and Y only. There are no jumpers installed between any terminals on the furnace board. No other wires are connected. Trane XV80 missing "C" wire at thermostat - Home The Honeywell instructions said to use the Green as "C", then on the furnace control box change Green from "G" to "C" and jumper the "Y" and "G". But the furnace control has a white wire coming from "B/C", make 2 white wires coming from the furnace. All of the other wires seem to correspond with the thermostat wiring.