Old rheem thermostat wiring diagram Thermostat wiring wires terminals w2 w1 y2 y1 rheem What all those letters mean on your thermostat’s wiring
Thermostat wiring diagram mean letters wire 2wire only where ifixit thermostats which goes
What All Those Letters Mean on Your Thermostat’s Wiring - iFixit
Old Rheem Thermostat Wiring Diagram - Wiring Diagram