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I want to install a new thermostat on my furnace, but the wire connections on the old thermostat are not marked. I have been unable to locate a diagram with wire labeling. Can you help?
I got the thermostat installed. It has a red, white and green wire. They were so dirty they looked brown, grey and black. The thermostat is working now, but the programing isn't. I set up the Mon-Fri, and Sat. Sun temps but it just stays on what I manually set it for. It defaults at 70 degrees, I set it to 65 when I went to bed (it was supposed to drop to 62) when I got up it should have been 62 but it was 70. I went back through the settings and they look good, it is just ignoring them. It is a Honeywell RTH 2310BHi,
I got the thermostat installed. It has a red, white and green wire. They were so dirty they looked brown, grey and black. The thermostat is working now, but the programing isn't. I set up the Mon-Fri, and Sat. Sun temps but it just stays on what I manually set it for. It defaults at 70 degrees, I set it to 65 when I went to bed (it was supposed to drop to 62) when I got up it should have been 62 but it was 70. I went back through the settings and they look good, it is just ignoring them. It is a Honeywell RTH 2310B
Thanks, it was 2 things. The program was on override and also when I set the time I got the AM/PMbackwards so even if it had been on it would have been heating overnight not during the day.
My instruction book was unreadable in places so I was guessing on the set up. Your comment made me look deeper in the book, Thanks!
KathyThanks, it was 2 things. The program was on override and also when I set the time I got the AM/PMbackwards so even if it had been on it would have been heating overnight not during the day.
My instruction book was unreadable in places so I was guessing on the set up. Your comment made me look deeper in the book, Thanks!
Kathy
Re: I want to install a new thermostat on my furnace, but...
Your t-stat has a override program on it look for the hold button and cancel the function. Should be able to just press the hold temp button and it will resume the normal program.
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This is not going to be easy. Check the wiring in the wall to look for the third wire. If they did not run one, you have to run new wire to the furnace and thermostat. If they stapled that wire to the walls inside studs, then it is going to be even harder to run the new wire. Once you run that new wire then you have to locate the connection in the furnace that has the common (c) wire for the transformer. Check you tube to see if the have any how to video.
Yep, you should be able to run your water furnace with the thermostat. Just wire it up same letter to same letter on both devices. If your thermostat worked before, it should work again. I couldn't find the honeywell part you listed, but the terminal designations tell enough on their own. Don't forget to shut off all power sources before doing any wiring, and to configure the control board on the water furnace before switching the thermostat to any active mode.
I will assume you did not write down what color wire you took of each letter on old thermostat? Sometimes color of wire doesn't matter as some installers will use whatever color. If you noted where each wire was on old thermostat, just put same color wire to same letter on new one. Under normal situation. y is for compressor (cool) G, is for fan (on AC) , RC is 24 volts from transformer for AC side, RH is 24 volt transformer from heat/furnace, and W is for other wire from furnace, is furnace is only 2 wire system. Was there any wire connected to A on old thermostat?
Make sure on the furnace that you have the same colored wires connected at the thermostat to R and W. Check for good connections at both locations. You can always test to make sure the unit fires by crossing the two wires together. If the unit fires, you have a bad thermostat.
Usually when you have the Y terminal on the thermostat (that would be cooling terminal), there should be 4 screws to connect to. They would be R- to transformer, W- to furnace or heat, Y- to outdoor air conditioner and G- to furnace blower.
You might go to the furnace to see where these wires go, they should have the same terminals on the furnace except for cooling, it usually connects to the outdoor unit wire directly.
If you have a programmable thermostat and it is a couple of years old you will probably have to install a new one. What kind of thermostat do you have? You can turn power off to furnace and then take thermostat off wall and take wires marked r & w and connect them together your heat should come on when you turn power back on. If not you could have blown the 5 amp fuse inside furnace. I would check the fuse inside of furnace. If you take panels off front of furnace you should find a controll board inside that runs furnace.If you have anymore question just reply back to me
Hi,
I got the thermostat installed. It has a red, white and green wire. They were so dirty they looked brown, grey and black. The thermostat is working now, but the programing isn't. I set up the Mon-Fri, and Sat. Sun temps but it just stays on what I manually set it for. It defaults at 70 degrees, I set it to 65 when I went to bed (it was supposed to drop to 62) when I got up it should have been 62 but it was 70. I went back through the settings and they look good, it is just ignoring them. It is a Honeywell RTH 2310B
Thanks, it was 2 things. The program was on override and also when I set the time I got the AM/PMbackwards so even if it had been on it would have been heating overnight not during the day.
My instruction book was unreadable in places so I was guessing on the set up. Your comment made me look deeper in the book, Thanks!
Kathy
are the wires colored? red ,white, green etc? Steve
Tell me what color wires go to which terminals on the old T-stat.
Then tell me all you can about the new T-stat and what terminals are listed on it.
Can you give me the colors of the thermostat wires.
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