Hi- I have a white Rodgers Thermostat- aprpox 1997- w/mercury tube -
It has 5 wires coming to it- 2 from my heat / 3 from ac
Honeywell says ignor the colors and use the letering
They have 5 terminals on the 221
Can anybody give me the right wiring as honeywell isn't clear w/the 3 wires
From my a/c
Thanks

Its hard to say with out knowing what system you have. Give us the wiring info of the old thermostat if you can. All info will help.