Question about Air Conditioners

1 Answer

I have a coleman evcon t-stat that is using 7 wires. I want to switch to a honeywell th3110d non-programmable t-stat but don't know where the wires should go.

Posted by on

  • Lorraine Newman
    Lorraine Newman Nov 25, 2008

    I have a EVCON 7 wire thermostat that I would like to replace with a Hunter

    programmable thermostat, but most of the wiring is different. Should I replace the wiring in its entirety from the unit to the t-stat or?

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 57 Answers

The most common wiring is: This sometimes varies as to installers preferance.
Red wire is your supply power to the T-stat. R terminal
Green wire is the blower fan. G terminal
Yellow wire is compressor contactor Y terminal
older units used a blue wire to Y
White wire is heat auxilary or black wire W terminal
Orange wire is reversing valve O terminal
Blue wire is the common C terminal
Black wire can be emergency heat E terminal
Best thing to do is replace wire for wire from t-stat to t-stat
or write down the colors to which terminal on the old t-stat and match to the new. make sure you SECURE POWER to the Air Handler, furnace and condenser before replacing any t-stat.
It is very easy to short the wires out if the power is left on and take out your A/H low voltage fuse or transformer.

Posted on May 18, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Need help understanding how to wire a new programmeable thermostat. I currently have a White Rodgers 1F73 model (non-programmeable) connected. I am confused with the instructions on how to connect the...


the black wire is your common wire, you need to program your thermostat, in the advance mode, to tell the t-stat if your heat pump reversing valve is energized on cooling or heating, is the orange wire connected to your t-stat.= w2/o/b

Dec 20, 2014 | Honeywell Air Conditioners

1 Answer

Replace a honeywell t822l1000 with a programmable unit


Match the thermostat wires to the letters on the new thermostat terminals R Red Y yellow ETC.

Nov 16, 2014 | Honeywell T827K1009 Mercury Free EconoStat...

1 Answer

Replacing coleman evcon thermostat


The Honeywell model RTH7500D is nice, simple programming is why I love it. Home Depot has it for around $50 I think. Good luck!

Jan 09, 2014 | Air Conditioners

1 Answer

We are trying to install a HoneyWell programmable thermostat (model RTH6350) and the colors do not match up. We have an orange wire, blue wire and white wire without a connection. It says to wrap the O,...


T-stat wiring is commonly connected with the following color codes:

On a straight heat and cool system:
White = W on T-Stat
Yellow = Y on T-stat
Green = G on T-stat
Red = R on T-stat

On heat pump systems:
Blue = W2 on T-stat

There is no guarantee that your system is wired using this system so you will need to look in the furnace and see where the wires are connected to. You will have another set, probably 2 wires, going to your outside A/C unit. They are typically red and white but could be any color as long as they are hooked up to the same connections. I.E. blue on R at t-stat and to R on furnace would be OK, it just makes it harder to service the unit if you don't know what wire is for what.

Just check your furnace connections and connect the same wires to your t-stat no matter their colors.

Jun 14, 2011 | Honeywell Air Conditioners

1 Answer

Have an Intertherm thermostate in mobile home controlling gas hearing and elec ac. Blue wire to thermostat connects to the "A" terminal on the thermostat...Blue wire goes to a terminal on the...


If there are only two wires going to the thermostat? Then you will not be able to use a Digital Programable stat. Intertherm and Coleman furnaces do the switching different than regular furnaces. They use the switching from heat to AC at the furnace with the rocker switch. They use the thermostat to either break the connection or make the connection. They use a heating only thermostat.... Hope this helps

Jan 02, 2011 | Intertherm P3RA-048K Air Conditioner

1 Answer

How to install a honeywell programmable thermostat


white wire for heat.. yellow wire for cool.. green wire for fan.... red wire power to t-stat.. or white wire to W yellow wire to Y green wire to G red wire to R leave jumper on stat

Aug 22, 2010 | Air Conditioners

1 Answer

Colman evcon ''B'' relay connection on new programmable t/stat


Hello The B wire now goes to the O termnal on new thermostat.

Apr 03, 2010 | Coleman Air Conditioners

1 Answer

Manual Thermostat replcaement with Programmable Digital unit.


Hopefully there are markings on the old t-stat as to what terminal is what.
on the honeywell 8000 use the heat pump labeling and then the standard wiring would be
R- red
AUX-white
Y- yellow
B- O/B
C- black
G- green
There should not be a bare wire, it probably just has the insulation stripped back way too far.
You should probably open the furnace and compare the terminal label in the furnace to the wire color. normally yellow and blue pass through the furnace and are wire nutted to wires going to the outdoor unit. In the furnace the white wire will connect to the w or w1 terminal. also, you will need to set the Honeywell stat to have the following parameters.
170-7
190-1
200-0
other parameters that I did not specify, you may read the manual and make your own decision but I recommend factory settings for the other parameters

Jun 14, 2008 | Ruud UBHC Air Conditioner

Not finding what you are looking for?
Air Conditioners Logo

Related Topics:

477 people viewed this question

Ask a Question

Usually answered in minutes!

Top Air Conditioners Experts

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Bill Long

Level 3 Expert

577 Answers

Tim Whalen

Level 3 Expert

3056 Answers

Are you an Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...