Replacing a thermostat

Unfortunately, the time to check where the wires go was when you removed them from your old thermostat. You need to match the pattern of the original thermostat to the HVAC (heat pump, furnace or other) system. Try going to your HVAC system's main inside box and opening the cover. Try to find the wiring connections to the control board. (This will be inside of the filter on most systems.) Take a picture or otherwise record which color wire goes to which letter terminal. I do not expect the wiring color pattern to be consistent over all the different types of heating and cooling systems installed by different companies.

In the package with your new thermostat, you may probably have little adhesive labels with lettering like Y, G, Rh, Rc, W. Take the appropriate label and secure it to the matching color wire as noted at the control board of the HVAC system. Then connect the wires to the matching letter locations on the new thermostat. (Modify any jumpers on the thermostat based on the installation directions.)

I hope this helps.

Cindy Wells
(I know that on my system (gas furnace and A/C forced air), there is an outside cover, the filter, and then an interior cover to access the control board. The board is near the bottom of the compartment.)

Return the Sensor

You want an OEM replacement
that is exactly like your old one

Screw it in Tighten a little
and plug in wire connector

Forget the wire colors and go by the terminals on the new and match on the new.

Usually R= POWER G= FAN W= HEATING RELAY Y= COOLING CONTACTOR

If the thermostat only has two wires that connect to it then your ok...

You will need to go to the heating system and see what color wires are hooked to that. Typically the black and white wires will be used unless they used another color due to a bad wire. Hook the colored wires to the R or RH terminal on the thermostat and the other wire to the W terminal. You can also try taking the wires you have and one by one twisting them together and have a second person inform you when the heating system turns on. Take those two wires and hook them to the terminals I mentioned above.

First, take the old thermostat off the wall.

there should be different colored wires coming out of the wall still connected to the old thermo.

on the new thermo, there might be a wire color chart in the instructions or on the inside of the new thermo.

You should be able to line up the colors and install them that way. let me know if you have any other problems

I replaced one unite with another and the wires are differance colors the old unites wires are red,purple,yellow,bleck and white the new one have orange,brown,cream,darkpurple,and white

How many wires do you have and what color are they?
Red is power to the thermostat, White generally goes to W1, yellow to cooling Y terminal, Green to G terminal. If you have different colors the set-up may be a little different. You can check at the unit which should have a terminal board which would also indicate which wires go to which terminals.

have you tried there web site for the wireing instructions or manual to installing it.
Programmable thermostats at discount prices at
hunter-thermostats.com.


riz.

You will have to trace the wires from the source, unfortunately, the colors may not be accurate. Do you have a 24v heat and cool system? I am going assume the answer of yes, as this is the most common. If you have something different, we will need to go over this again. According to the new thermostat, the red is the power, it will come from the low output side (24volt) of the transformer. Green is blower fan, it will go to a relay that turns the fan on when the thermostat is set from auto to on. The white is heat, this will go to the pilot/ gas valve etc. Last is yellow or blue, either color is for the cool. This goes to the control for the compressor, usually the contactor.