My old thermostat is to be replaced by a newer honeywell programmable RTH7400.
The wires on my Lennox are as follows: O,G,Y1,R,L,T- ( jumpered to C ),W1,E.
The W1 wire is connected to the old thermostat.
Pretty easy here, but the T is not used anymore and the Y1, W1 wires ire throwing me off?
Any input is greatly appreciated.
