wyleyrabbit
Well-known member
Mod - Installed Honeywell digital thermostat - Need help - Solved!
Hi everyone,
I purchased a Honeywell RTH6400 thermostat from HD a couple of days ago and installed it as closely as I could to the instructions. Initially, the way I wired it up didn't start the furnace fan but I found a setting in the menu that allowed the thermostat to control the furnace and fan independently and that seemed to work.
Unfortunately, the unit doesn't play well with the air conditioner. It's probably just the way I have it wired up which may be the cause of my grief. Currently if the system is on "cool" then the AC works as expected. If the system is on "heat" then when it turns the furnace on, it also turns on the AC...not so good.
Has anyone wired one of these up? If so, what wires went where?
Thanks,
Chris
Hi everyone,
I purchased a Honeywell RTH6400 thermostat from HD a couple of days ago and installed it as closely as I could to the instructions. Initially, the way I wired it up didn't start the furnace fan but I found a setting in the menu that allowed the thermostat to control the furnace and fan independently and that seemed to work.
Unfortunately, the unit doesn't play well with the air conditioner. It's probably just the way I have it wired up which may be the cause of my grief. Currently if the system is on "cool" then the AC works as expected. If the system is on "heat" then when it turns the furnace on, it also turns on the AC...not so good.
Has anyone wired one of these up? If so, what wires went where?
Thanks,
Chris
Last edited: