Does this thermostat require 3 wires or just 2?
870433
It requires 5 wires. One is the C wire which is 24 volt power which is necessary because it has no batteries.
870434
My heater used four wires. But the directions gave several different ways to wire the thermostat. You should be able to go on line with Honeywell an get the instructions. So far it is a great thermostat, lay in bed or on the way home and can turn the heater on or off with my iPhone. Also can talk to it to get it to turn up or down the heat.
2101375
Not sure!! Try this #800-468-1502 Or this website http://DIYthermostats.honeywell.com I"m guessing but a 2 wire system would only be for heating OR cooling not both.
1264514
It will work for a two wire. It can also be programmed and can handle a ac/heat pump configuration. Complete instructions in the package.
1066010
This Thermostat takes 4 wires. Compare the wiring design of your current thermostat with the Honeywell. I had to run the 4th wire for my system which was the C wire.
1440797
No just 3 wires.I would save your money and buy something else mine only lasted a few months and quit working
302303
It is as basic as can be, just a two wire thermostat. A quad baseboard system is news to me. Just be aware this is a simple device. Mine works perfectly on a hot water baseboard system.
1172426
Sure. The only requirement is that the wire going from your thermostat to you boiler or furnace has to have 3 strands. If it only has 2, which is quite common, a third strand or new were with 3 strands has to be run.
1066007
You must supply power to the thermostat. In my case, more wires ran between the furnace and the thermostat than were actually used on either end. I just had to figure out where to connect one of the extra wires on the furnace side, to supply the power to the thermostat.
1304143
My previous set up was 3 wires. 2 hot and a ground. I did a few searches and was told that this unit did not need the ground wire so I left it disconnected as there is no place to connect it. The unit has been working fine for 8+ months now.
1066009
I bought the thermostat today, and found out that my original setup had only four wires; missing C wire. But Honeywell have a video showing you how to substitute G wire for C wire. https://www.youtube.com/watch?v=F05lIaNTMB4 Basically, G wire is for operating Fan only mode (no heat / cooling). You loose the ability to use FAN only to power this thing. You have to change wire on the back plate as well as in the A/C-Heater. I'm not very skilled, but I was able to do it, just following the video.
661456
The one I have is 2 pads on one wire and another 2 pads on another wire. There are 2 spots in the unit to plug in 2 wires. One to the left side and one to the right side Hope this helps
101074
Depends on how many wires , your voltage and wattage. This thermostat uses a two wire setup. It seems like you might have 4 in which case it wouldn't work. Maybe check out the Honeywell site for more specific information and the manual on it.
1600903
Direct wired unit, this is better- you can buy longer wires and choose way you connect it/ plug in or use separate thermostat.10/2 wire required. Depend on installation you may use flexible conduit.
1956327
First of all you don't have to activate this sensors. Wires from thermostat should have connection to this sensors. You connect the sensors first and then thermostat. Hope this helps. Let me know if you have question.
433469
It needs two wires for 24volts. Just installed one at my home. It's a great thermostat and install is not difficult, just give yourself an afternoon to make it look nice. Good luck
136890
This is just a thermostat. To control two zones you need two thermostats and a device on the furnace. It makes little sense to have a single thermostat which can by definition be in only one place controlling two zones.
1276601
Don't know how to work with 2 wires. This switch took three wires: blue for load, black for hot line, and white for neutral line. You need to have three wires to make it work.