Top positive review
83 people found this helpful
on July 6, 2013
I bought this to replace a White-Rodgers non-programmable thermostat (it looks like this one: [...] This product is a fine replacement.
I bought my house with an 80% efficiency gas heater installed (Trane, around 7 years old), but no air conditioning. Around a month ago, I had air conditioning installed (Carrier). The non-programmable thermostat became a bit annoying because it got too hot during the day and too cold at night, depending which direction I changed the temperature.
I took a look at the old White-Rodgers thermostat and had the following connections: white to W, red to RH, a red jumper from RH to RC, blue to C, green to G, and yellow to Y. (A very good reference for what those all mean is [...]
The Honeywell unit does not have an RH terminal, only an R and an RC. I assume R, RH, and RC are all the same (at least in this situation), but not wanting to start a fire or something, I called the customer support number and was incredibly surprised to find that the person I spoke with was actually able to help me.
Turns out--and please don't blame me if it breaks your system--that red goes to R on the new unit and the jumper between R and RC (there by default) remains in place.
Minor annoyance: the Honeywell *requires* batteries. The White-Rodgers unit operated without batteries (the person I spoke to told me the blue wire, C, supplies power). Since the Honeywell doesn't take a C connection, it must run on batteries. (Hopefully they last a couple of months at least.)
My final connections: white to W, red to R, jumper from R to RC, green to G, and yellow to Y.
One more minor annoyance: you'll need an incredibly tiny flathead screwdriver to tighten the terminal connections. If you have an eyeglass screwdriver or similar (and know where it is), you'll be fine.
Otherwise, I'm very happy with the unit and Honeywell's phone support.