I replaced a White Rogers thermostat type 1f80 51 with a ...
I replace a thermostat type 1f80 51 with a honeywell rth221. The WAR thermo was a four wire,, red, yellow with a Answered by a verified HVAC Technician
4 wire wiring diagram rth221 Gallery
honeywell rth221 wiring diagram
honeywell wiring diagrams
or 120 volt 20 amp twist lock receptacle