Changing Heat pump Thermostat.
Asked Nov 11, 2005, 09:14 PM
Currently have a Honeywell T841A1712 Multi-Stage Heat pump thermostat. I am changing to a Honeywell RTH7500D. All is good except that the manual states "If the old thermostat had wires on W1, Y1, and W2, some modification is required. Call your loca heating and cooling contractor for assistance."
What kind of a modification would be necessary and is it worth the cost. The Thermo cost me $105. Really can't spend any more $ on this. I will return it if need be.
Wiring is so:
R - red wire
O - orange wire
Y1 - has a yellow wire connected
W1 - is bridged to Y1(no direct wire attached to terminal)
E - Blue wire
W2 - white wire
Taken from HERE!!
PLease let me know if there is a way to wire this properly.
Last edited by jet; Nov 11, 2005 at 09:17 PM.