I see most of these units are 3 speed. I have a 2 speed. will I have to change thermostat and wiring?
637567
I never hooked mine up to the existing thermostat. There is one built in to the unit.
637568
If using 2 speed will be ok as that is what we used. If 3 speed wiring and thermostate would need to be changed.
1540894
Not sure about your heating system, but mine has two wires only. I connected them to R and W with no issues.
223431
No. What you have is a knob that has low, medium and high. I have not had any problem with this setup, I don't know if a thermostat would make a difference. If I had a furnace yes a thermostat is what you want.I prefer to control the unit myself.
1789634
Jeff is correct. Only two wires (conductors) are needed. If you have thermostat wire with more than two conductors, no problem, just use two of them and ignore the rest.
2110264
probably ! my fan had only 3 or 4 wires and i figured it out. I am not so mechanically inclined, but I was willing to try to fix my fan. It had only 1 speed ! this did the trick !
2272144
I did it myself, with basic knowledge of wiring. You might have to do a bit of research depending on your units wiring, but it really isn't any harder than any other thermostat.
1349578
The speeds are controlled with one of the pull chain switches. You should not have to buy anything additional. If it is not working it is probably in the wiring.
701884
Not if you use the derale online thermostat switch. I used the 180 degree on to 165 degree off. With the derale wiring harness and relay. Easy to wire up, works great.
1855222
I used mine to interface to a zone controller so that would not be available as an option. I did not see any options on the programming of the stat. to control speed any way. My best guess from not seeing that option is that the thermostat would not control the speed but cant say for sure, I am not sure if your air handler has any sensors in it to detect if it needs to change fan speeds without a signal to do so from the thermostat, you could check on what actually controls the speed of the fan your equipment. This thermostat has tons of programming options and is the very best I have ever had or seen, but again I did not see programming options for speed control.
1611154
I believe so, check with your installer because this unit comes with two components,1: is the thermostat itself, 2: is a unit that connects at the furnace or AC unit.
982917
Mary, I am not an electrician. I also did not have corresponding yellow wires, but did have two wires that went into the unit I replaced. I just connected to the two wires going into old thermostat and I was good to go.
2081076
John: With a 3 wire theromstat you most likely have 1 stage heat, 1 stage cool and common. I am assuming you have 3 thermostats in the house as well as 3 HVAC units or only one HVAC unit with 3 zones attached to it. If the former, 3 separate HVAC units, then I believe you will need 3 wireless set-ups. If only one HVAC unit with 3 thermostats then I am reasonably sure you will need a Honeywell wirelessTrue Zone panel and 3 wireless thermostats. Based on my research, Honeywell makes the best wireless set up--but it can become pricey. Hope this helps. Steve
1067429
Make sure it is a 5 wire for 5 wire swap. It will change the fan speed. I would be concerned going from 2.5 uf to 6 uf. Don't think I would do it.
1372236
No thermostat. Super quiet. 3 speed. You could simply use a heavy duty timer vs a thermostat. Its a great value for the money granger over five hundred buxxxxx. Good luk
827456
Amazon cut your question off. Make sure you use the new baseplate w/new stat. They are not identical. Wiring is same.
129564
I'm not sure what a 2 stage heat and AC unit is exactly. I have this on a system that contains a furnace and an AC unit. The system is zoned forced air and this one is for one zone of the system. The other zone is controlled via a wired device.
1279358
Depends on your system. The manual states that this thermostat is for two wire systems (not counting a C or C1 wire). This does not work for 3 wire systems and list an 800 number for Honeywell Customer Service to call and check. I would list the number but Amazon would likely delete it.