Honeywell RTH7500 question - http://www.hvacmechanic.com/ Forums
Original message
| joeyd1976
 |  "Honeywell RTH7500 question"
, posted Tue 7 Oct 16:00  
I am attempting to install the 7500 and have a gas furnace and heat pump, which I would like to use for cooling only. So far, I have only been able to get the heat pump to heat the house with the furnace as the backup. I have O, B, W, RC, Y, and G wires. The O was not connected with the previous thermostat.
Any ideas?
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