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Someone from honeywell actually called me because I emailed their support. The guys said the way I did it is not common and that he thinks to make it make sense using a relay switch would work? Do...

The damper is a zone a trol. The wiring instructions on the damper say to wire R to 5 (function per damper manul says common of swith and makes to either 4 or 6 to operate damper), W to 4 (makes...

Thanks. I had the same thought last night as what I think you are saying. It clicked that these dampers are used for heating and cooling and the motor is wired the "opposite for coolin" so Y opens...

I have basebaord hot water heat with a boiler and three zones and three separate thermostats for each zone. I have one air handler in the attic with two zone value for and two thermostats for this. ...

I have basebaord hot water heat with a boiler and three zones and three separate thermostats for each zone. I have one air handler in the attic with two zone value for and two thermostats for this. ...

Here's a crazy question, can I combine my two separate onto 1 thermostat? I don't think so because I will end up with two heats?

I know. It seems so easy which is so frustrating.. I am going to try and again tonight and try the auto switch one also. Will let you know how it goes. Again thanks.

One thing to note is this termostat only controls the AC, there is no fan mode on the old thermosat that worked, it was either on or off. You can turn the unit on from any one zone and then the...

One additional question, will that autochange over work even if I only have AC hooked up to it. I guess the idea is it will hit the temperature and then trigger the white heat wire signal which will...

Thanks a lot I will try it.. Makes sense that one I have doesn't have auto change. Appreciate it.

My situation is as follows. I currently have a honeywell ct87k which only has three wires w,y,r. I have one air unit with 2 zone dampers. I want to switch to programmable ones to save energy so...

Thanks I actually did some more research and I have the Robertshaw TX400 and the coding is as follows:

w = heat
r = common
b = cool


Can I ask you one more quick thing? The R = Common does...

The B and W are to open and close the damper valves, I just don't know how that translates to the new thermostat.

I really appreciate your help by the way.. I am sure I can figure it out just don't want to risk shorting something out, but think I will be OK as long as the Red Rc is connected to the Rc on the...

Yes, the wire label designations for the white is W Heat, for the Red it is Rc and for the Blue all it said was Cool. I am currently in the office now and not in front of it however that's all they...

The old ones are Robertshaw, not sure of the model number the new one is the honeywell Rth6500B. The old ones are shot and I wanted to put programmable ones in for efficiency

I currently have two zones for cooling only and the thermostat wires are red, blue and white. The red is labeled Rc which is easy, the white is labeled W Heat (this doesn't make sense to me) and the...