Need help with thermostat replacement wiring


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Old 09-20-14, 05:09 PM
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Need help with thermostat replacement wiring

I need help with Honeywell thermostat wiring. I heave 5 wires and here is what I know about it.

Red - Hot
White - Pump ( the A/C unit thats outside providing heating and cooling)
White - I belie its heat
Blue - Fan inside of the house
Yelow - A/C

First white, has to be hot with AC or Heat I think.
Please help me to get this thing up and running again.
 
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Old 09-20-14, 05:14 PM
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Did you write the colors and letters down from the old thermostat ?

First white, has to be hot with AC or Heat I think.
That isn't the way to do wiring.

The yellow should be on Y.
You are using 5 wires but there are more there. You can't have two whites in one cable.
 
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Old 09-20-14, 05:25 PM
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That's the problem, When contractor was doing the drywall, he took it off and didnt label it. I know that the picture is incorrect. Withe wire next to the red one, will turn on the unit outside. If I I connect red/white/blue and yellow, A/C is on and if I connect red/white/blue and another white, heater is on.

Oh and another white is separate cable, don't ask me why LOL

BTW. Thank for a quick reply.
 
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Old 09-20-14, 05:50 PM
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Here are the picture of the wiring from both units.

Inside Unit:

Outside unit:


Diagram: (light gray is white next to the red, dark gray is the white two)
 
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Old 09-20-14, 05:53 PM
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Red -- > R/Rc
Blue -- > G
Yellow -- > Y
Old dirty white -- > Aux/E
New white -- > O/B

You have two multi wire thermostat cables connecting your t'stat to your equipment.
The wiring code I posted would be my educated guess.

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Old 09-20-14, 06:16 PM
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When I do that, here is what I get:
AC: Fan -on Compressor - Off
Heat: Fan - off Compressor - On
 
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Old 09-20-14, 06:22 PM
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Are you sure you have a heat pump...... does the outside unit run in the winter to make heat ?
 
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Old 09-20-14, 06:23 PM
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It looks a lot like you have a heat pump that is wired for straight cooling.

What is the model number of the outdoor unit?
 
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Old 09-20-14, 06:34 PM
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Here is the outside unit model number : (tempstar 5000)
 
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Old 09-20-14, 06:51 PM
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Yep, a heat pump wired for straight cooling.

Is the filter drier a bi flow model or does it have IN stamped on one side?
What is the model number of the indoor coil? (or more importantly the TXV if present)

If you spread the existing wire connections and get better pics it would be easier to verify the existing wiring.

You would need to configure for straight cooling with the current wiring at the heat pump.
 
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Old 09-20-14, 07:00 PM
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Is the filter drier a bi flow model or does it have IN stamped on one side?
I'm not sure what you mean. Here is the pictures(right click > view image to view large).
The coil:


Outside unit:
 
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Old 09-20-14, 07:07 PM
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I took multiple picture, you can find it here: https://www.theigor.net/imgs/index.php/Random
Thank you for helping me
 
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Old 09-20-14, 07:09 PM
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Here is the service manual for the condenser: http://icpindexing.toddsit.com/docum...2808100101.pdf
 
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Old 09-20-14, 07:22 PM
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I see no filter drier at all...
Name:  drier biflow.jpg
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Old 09-20-14, 07:36 PM
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I don't see it ether. As far as I know, it should be outside by the compressor. I've checked inside and no sign of it anywhere. If I connect the wires manually, it works. Any ideas? Also Honeywell thermostat (RTH6450) has different options for different systems that I'm trying right now.
 
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Old 09-20-14, 07:55 PM
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I suggest you locate the defrost control board in your heat pump and make a list of the wires that are attached to the R, W, Y, C and etc. that are circled in red on the attached photo. Once that is done follow each of the wires from those terminals to see where they are attached and make a diagram. Keep doing that until you reach where they are attached to the wires that exit from the house. The most efficient way to figure out where your wires are supposed to go is to configure them back to standardized wiring colors such as Red to R, Green to G, Yellow to Y, White to W and etc. on both ends and in the air handler. Doing that will get you on the path to success.
 
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Last edited by firedawgsatx; 09-20-14 at 08:11 PM.
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Old 09-20-14, 08:16 PM
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Mine looks different.

 
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Old 09-20-14, 08:29 PM
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Ok, Then locate the wires where they come out of the house. There should be five. Trace each of those wires and see where they attach. If they are wire-nutted, diagram which wires they are connected to and keep on going until you see where they ultimately attach. It is tedious but necessary to get the mess straightened out.
 

Last edited by firedawgsatx; 09-20-14 at 09:25 PM.
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Old 09-20-14, 09:33 PM
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If the wiring diagram I found is accurate there should be five wires that exit the house. The wiring diagram shows where the following wires should terminate inside the condenser as follows:

Red (R)-- 24V terminal on defrost board
Yellow (Y)--to 24V coil terminal on contactor. It may route through time delay and/or low or high pressure switches
White W)--to terminal 1 on defrost relay
Blue (C)--to 24V coil terminal on contactor
Orange (O)--to coil terminal 1 on heat-cool relay

If you can verify these terminations are accurate that will be helpful.
 

Last edited by firedawgsatx; 09-20-14 at 10:10 PM.
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Old 09-20-14, 10:46 PM
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That seems to be correct.
Outside wires video:
https://www.theigor.net/tools/converter/converted_vids/ac_wiring_ouside.webm Inside wires video:
https://www.theigor.net/tools/converter/converted_vids/ac_wireing_inside.webm Thermostat wiring:
[ATTACH=CONFIG]38630[/ATTACH]
 
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Old 09-20-14, 11:15 PM
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I have attached a basic wiring diagram of how your heat pump low voltage SHOULD be wired. The broken blue line going to the thermostat is an optional connection but is a good idea to connect so you will have constant power to the thermostat instead of having to use batteries. According to the wiring diagram you posted earlier you only have four wires going from the air handler to the condenser. It normally takes a minimum of five wires to connect up a single stage system. If you locate the five low voltage wires that are inside the condenser and determine where they exit the condenser it should be an easy determination of where the wires from the thermostat and air handler connect. As I mentioned earlier, I would do my best to get back to the conventional wiring color code as much as possible. That way any problems you may have in the future will be easier to deal with. Of course, for example, if you don't have an orange wire in the thermostat cable at your thermostat you would have to substitute another available wire color and then make sure it is consistent all the way out to the condenser.
 
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Old 09-20-14, 11:24 PM
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I was working on the diagram while you posted your video. It looks like progress is being made. In your video you said the green wire outside "is going inside". Can you clarify what inside means as inside the condenser or it originates in the air handler and is not used outside.

Also outside you did not mention anything about where the yellow wire goes in the condenser.
 
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Old 09-20-14, 11:39 PM
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The broken blue line going to the thermostat is an optional connection but is a good idea to connect so you will have constant power to the thermostat instead of having to use batteries.
I don't have C on this thermostat.
According to the wiring diagram you posted earlier you only have four wires going from the air handler to the condenser
I forgot about the blue one that is on your diagram. Its actually brown at the thermostat and it connected to blue at the air handler.

Your wire diagram is how I have it connected right now (colors may not mach at the thermostat terminals, do to someone didn't care what color is what wire when they install the unit, but in the and it's exactly as it shown on your diagram) and it's steel doesn't work. I'm suspecting that my thermostat needs to be programmed.

Can you look at this manual (page 16), and tell me which mode to select?
Manual link: https://customer.honeywell.com/resou.../69-2416ES.pdf

Thanks for helping me out, I'm about to trash the whole thing and just replace it.
 
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Old 09-20-14, 11:49 PM
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Function 1 should be set at 5 if you want heat and cool. Set it to 4 for a/c only.
Function 2 set to 0
Function 3 to 1
Function 5 to 9
Function 6 to 9
Function 8 to 9
Function 12 to 0
Function 13 to 0

You are correct you do not have a C terminal on your thermostat and the common wire from the transformer should not be connected at the transformer.

Have you determined which wire connects to the orange wire inside the condenser? That is the wire that we need to make sure is correct to make it work in heat and cool.

The red wire goes to R at the thermostat
The yellow wire goes to Y at the thermostat
The green wire goes to G at the thermostat
Still need to figure which wire ends up at the orange wire inside the condenser.
The white wire that ends up outside goes to W
 
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Old 09-20-14, 11:51 PM
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In your video you said the green wire outside "is going inside"
Green wire is going inside of the condenser and not inside the house/air handler. I cant get to it without popping the top cover.
 
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Old 09-20-14, 11:58 PM
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Ok. We need to figure out which wire is going to the orange wire inside the condenser. I'll watch the video again and see if I can figure it out.

Do you have electric heat strips for auxiliary heat?
 
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Old 09-21-14, 12:02 AM
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Red coming from inside of the house is connected to orange inside the condenser.
 
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Old 09-21-14, 12:05 AM
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The red should go to the defrost board where it says 24V, OUT. COM, Hold. Red goes on 24V terminal
 
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Old 09-21-14, 12:07 AM
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Sorry, it does go to the defrost board. Let me go look at the orange wire.
 
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Old 09-21-14, 12:13 AM
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I have attached a photo where the red wire from the thermostat should be.
 
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Old 09-21-14, 12:17 AM
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The orange wire should go to the heat-cool relay which is below the larger brown relay.
 
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Old 09-21-14, 12:17 AM
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Yellow from the house connected to the orange at the condenser. Its connected to Y at the thermostat
Green from the house connected to yellow at the condenser and connected to O at the thermostat.
 
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Old 09-21-14, 12:20 AM
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I have attached a photo where the red wire from the thermostat should be.
Yes, its connected to R at the thermostat.
 
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Old 09-21-14, 12:20 AM
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Another photo with what I believe to be the orange wire on the relay.
 
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Old 09-21-14, 12:28 AM
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The orange wire should go to the heat-cool relay which is below the larger brown relay.
yes, and its connected to O at the thermosName:  20140921_002350.jpg
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Old 09-21-14, 12:30 AM
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Okay, that is good. Which color wire do you have on the O terminal at the thermostat right now?
 
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Old 09-21-14, 12:36 AM
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its white but its different white from the heating. Its white at the thermostat, going to air handler, from there its connected to green going outside to the condenser and at the condenser its connected to orange (heat-cool relay). So, O is heat-cool relay.
 
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Old 09-21-14, 12:40 AM
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Okay, that is what I wanted to hear. I believe you should have it now, Confirm the following at thermostat:

R=Red jumpered to RC
W=White
O=Other white
Y=Yellow
G=Green

You never did confirm what type of heat you have. That will dictate how the thermostat has to be set-up. The numbers I provided earlier were just my best guess.
 

Last edited by firedawgsatx; 09-21-14 at 01:03 AM.
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Old 09-21-14, 01:08 AM
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Heat is coming from the same unit ( from A/C condenser). When heat is on, outside fan is on too.
 
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Old 09-21-14, 01:11 AM
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I understand that. But, normally you will have electric heat strips installed in the air handler than come on when the heat pump goes into defrost mode in the winter and also serve as emergency heat if the heat pump breaks down. But being from California with a relatively mild climate, who knows?

Have you tried the system yet to see if it will work?

Here is a photo of the heat strip list you posted earlier. The installer is supposed to mark the electric heat strips they install (but rarely do).
 
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