Installed thermostat wrong?

Question

We installed a new courier thermostat today. The old therm, had blue, red, yellow, green and white wires. We attached Red to R, yellow to Y1, Green to G, White to W1 and the blue to C. When we turned the power back on, the therm doesn't turn on (work at all). The directions say to attach the brown wire to the C, but we don't have one and called courier and they said attach the blue to the C. What did we do wrong?

OK, so I checked the furnace and the blue wire is NOT hooked up, we don't know where to hook it up. THere is not a wire hooked up to the Y, is that where we hook up the blue wire? If so, we have the yellow hooked up to the Y in the thermostat....THere is no C in the furnace.

Answer 1

It appears you hooked it up correctly, assuming that the old stat was wired with common color coding.
Check how the terminals on the old stat were hooked up. Did the old stat have R, Y, W, G, and C marked on the subbase and was the color coding the same as you hooked up the new one?
If the old stat was a mercury type, it did not need 24 volts to operate and therefore didn't need a common (in your case. we are assuming it is the blue wire), and the blue wire may not be hooked up in the furnace, so where was the blue wire hooked up on the old one? If it is not hooked up in the furnace, the new stat won't work (unless it has battery backup)
Compare the terminals between the 2 stats, make sure they're the same. The new stat may be bad.
Hopefully, you turned the power off to the furnace before you replaced it. If not, you may have also fried the transformer or may have blown a control fuse in the furnace.

Added 1-22 : I can help you if you tell me how the terminals were designated on the old stat, what colors were hooked up to them, what brand of furnace and also does it have a circuit board or not. The yellow wire from the stat may not be hooked up to the furnace but should be hooked up to a wire that goes to the outdoor unit (if you have A/C and if this is all wired per common trade practice).

Answer 2

Your new thermostat should have some kind of a jumper between RH and RC.If it doesn't then look in the box for one and if it doesn't then look at the old stat and use the one on it.You should also see if the new stat has a H.P./gas
switch on it and set it to the correct.That will be located on the back of the stat by the batteries.Did you change your stat because the furnace isn't working correctly?If so you may want to call for service.

Answer 3

Your thermostat connects to your heater and possibly air conditioner using these color coded wires. There is a possibility that the wires were connected improperly on the other end. Go to your heating unit and see if the wires are connected to the proper color codes there. You will find the wires in a closet or space where your heating unit is installed.

Why did you change the thermostat? If it had stopped working, it is possible that your 24 volt transformer is the culprit not your thermostat. If this is the case, if you will send me a message from my profile, I will go into more detail about your 24 volt transformer. Where it is located and how to test it.

This thermostat wiring is designed for a system with five wires -- the wire terminations are marked as follows:

* RH - This wire comes from the 24VAC transformer on the heating system.
* RC - This wire comes from the 24VAC transformer on the air-conditioning system.
* W - This wire comes from the relay that turns on the heating system.
* Y - This wire comes from the relay that turns on the cooling system.
* G - This wire comes from the relay that turns on the fan.

Answer 4

A car is post to run in a heat range To hot it will over heat and blow head gasket or even lock up engine. Cold it will not go into cold loop. which mean it will run rich. The extur gas will end up in the exhaust and the 02 sensor will go out. The conver can stop up and stop the care from running till conver is replaced. Yes! cool engine will run better and have more power. But to cool engine it will use a lot more gas and do damage as above. You have two temperstat you can use. 195 and 185. A 180 is to cold. These are only examples No temperstat is the worse of all.

Answer 5

My dad once installed a smart thermostat and it didn't work. He took it out and waited for me. When I reinstalled it I took time to read the book. The thermostat he bought had a 10 minute delay built into it. It is designed to prevent the A/C from short cycling. It is a good feature and I recommend it but it can drive a person to distraction if they aren't aware of it.

Hope it turns out to be that simple. Good Luck.

Answer 6

If you need it now put the old one back in. I don't know I want attempt this one it's to cold right now, we have a new one and my soon to be son n law is a heating and air guy and he was suppose to put it in a year ago. I guess he forgot.

Answer 7

Maybe your new device is`nt level. Have`nt messed with one for years, don`t know if the newer technology requires it or not, but it may be an easy check!!