When I had the furance serviced, the tech told me that it is a single stage thermostat and I should consider replacing it since I've got a multistage furance.
I bought a White-Rodgers 1F81-261 multi-stage programmable thermostat and had a question on the installation.
On the current manual thermostat, there is a green, red and white wire connected. On the new thermostat, there is a terminal for a 2nd white wire to activate stage 2. Do I need to just jumper W1 to W2 in order to activate stage 2? If not, what do I need to do?
Also the manual talks about how to using the 2nd stage setting. The manual says,
Select Stage Fast (ON or OFF) - When selected ON, the second stage starts as soon as the setpoint temperature is manually raised 3° F in heat or lowered 3° F in cool from room temperature. When selected OFF, the second stage will delay approximately 15 minutes before starting.
Can anyone recommend how I should set this, whether as ON or OFF? Would I burn less fuel if I leave the setting off and let it run mostly in stage 1?