Honeywell Rth6450 Thermostat Wiring Diagram. I just tried to replace the old thermostat with a honeywell programable. Wiring a honeywell thermostat rth7400 w heat pump 1 answers i am replacing a honeywell thermostat model unknown 8 wires w emergency heat pump with a programmable honeywell thermostat model rth7400.
Thermostat automatically selects heating or cooling depending on the indoor temperature. If labels do not match letters on the thermostat check the chart at. For the y y1 and y2 wires y or y1 will go to the y terminal and y2 will go to the y2 terminal.
Honeywell rth6350rth6450 wiring.
Honeywell rth6350d wiring diagram. 69 2416es05 2 remove old thermostat but leave. Ive never really thought it performed as it should but its the first heat pump system ive ever had so i am not too sure how it really works. For the y y1 and y2 wires y or y1 will go to the y terminal and y2 will go to the y2 terminal.