Question about Air Conditioners

1 Answer

My old thermstat has only two wires how can i connect it to RTH8500 honeywell thrmostat

Posted by on

  • Purgatory Dec 03, 2008

    my old thermstat has only two wires how can i connect it to RTH8500 honeywell thrmostat

    Same issue with the RTH8500,
    I have a forced air gas furnace and only two wires going from the unit to the old thermostat. (don't rightly know what colors they are as the wiring from the furnace to the thermostat was a hack job splicing 3 different lengths of wire together)




×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 31 Answers

Do you have heating and cooling

Posted on Nov 16, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Ct87n thermstat is hooked up and the heater is on because i smell the heat but it is not blowing out the vent


The blower motor isn't running. At the thermostat, red wire to the R terminal white wire to W terminal.or W2 If the blower still doesn't run It's probably not the thermostat.

Nov 07, 2014 | Honeywell CT87N - Round Heat/Cool...

1 Answer

Honeywell wiring diagrams


WE R GOING FROM A HONEYWELL TAYSTAT500 THERMSTAT (HEAT PUMP) TO A NEW HONEYWELL to (WHOLE NEWHEATING/AIR CONDITIONER) WITH A HONEYWELL RTH8580WF1007 THERMOSTAT? WHERE WOULD THE C WIRE BE. WE DO NOT HAVE A WIRING SCHEMATIC FOR THE OLF THERMOSTAT. IT HAS 7 WIRES. HELP?

Jan 10, 2014 | Air Conditioners

1 Answer

I bought a Honeywell RTH8500 thermostat and I can't get the temperature to go down past 75 degrees


You will need the installation book that came with the thermostat. There is a way to enter into the programming of the thermostat from the home screen. From there, you will need to find what code is the temperature settings in the manual, they are usually all 3 digit numbers. Once you find the code for the setting your looking for which is the lowest temp for the thermostat, it will have a 75 to the right of it which you can set a lower number. Sorry I do not have the manual right now to just tell you exactly how, but hope this still helps!

May 28, 2012 | Honeywell Rth8500d 7-day Touchscreen...

1 Answer

I had a Honeywell Thermostat RTH8500 installed by a pro to run Heat / Cool electric heating WITH central air conditioning. Problem : When running on cool Fan on auto ,it work OK but sometimes when the...


Is this a new hvac system? A new furnace can work differently than your old one. Does it shut off after a minute or two or continue to run? If it continues to run then call that professional back and let him fix it. If it shuts down after a minute or two then it is a feature of the new thermostat to squeeze all of the cool it can from the a/c coil and ductwork.Some of them have settings that you can adjust for blower delay on and off, read the manual that came with the t-stat and see if it does.

Jun 16, 2011 | Honeywell Air Conditioners

1 Answer

How can I unlock this th


Remove the thermostat from its base and replace the batteries. To remove the thermostat, grasp it at the edges and pull toward you. The batteries are on the back of the thermostat housing.

Read more: How do I Unlock the Digital Display on a Honeywell RTH8500 Thermostat? ' eHow.com http://www.ehow.com/how_7267447_do-display-honeywell-rth8500-thermostat_.html#ixzz17KTxLwBU

Dec 05, 2010 | Honeywell Air Conditioners

1 Answer

Wiring mdel 44155c unable to wire properly


what wire goes where on new thermostat my wire on old thermostat are red, white, green, and blue ro could u please tell where to connect them on this new thermstat.

Nov 02, 2010 | Hunter 30124 Air Conditioner

1 Answer

Im changing an old honeywell thermostat with a new honeywell thermostat. the old on has wires 4 wires connected to 4 screws C,R,G,W but the new thermostat has a place where the wires go which are...


Yes, I believe that you will be fine. If the original wiring is correct then I have listed the basic wiring below. As always read the directions and make sure the wiring matches your system.

Red wire = Rh (24v power, should have an exsisting jumper to RC)
White wire = W (heat mode)
Yellow (or sometimes blue) wire = Y (A/C)
Green wire = G (Indoor Fan)

Jul 03, 2008 | Honeywell Air Conditioners

Not finding what you are looking for?
Air Conditioners Logo

Related Topics:

53 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...