I have a Lennox G61V furnace and currently using a Honeywell CT3451 stat. I would like to replace my stat with a honeywell rth6400 or a Honeywell rth7500 model. What do you guys or girls suggest?
I only have 5 wires running to my stat.
My wiring right now is follows: 1 wire on each
Would I have to run new wires directly to the furnace to get the RTH7500 model to work?
Would the rth6400 work just as good?
Any advice is greatly appreciated.
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