I'm attempting to install a Honeywell programable thrmostat to replace my old mercury white rogers t stat.
When I pull the old T stat it has 4 wires coded as follows
The new thermostat mentions RH and W wires but I'm nit sure what the T1 and T wires are for. My guess is a timer as the old TStat had a timer and did not use batteries. I'm tempted to just cap them and go on with the install.
Anyone have any ideas?