Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-05-2010, 12:01 PM   #1
Newbie
 
Join Date: Jul 2010
Posts: 12
Share |
Default

Thermostat to Controller Wiring


I went to replace my thermostat with a newer one, and have some questions. The wiring doesnt seem to match up.

First pic is the wiring to thermostat. White was wired to W. Yellow was wired to Y. Green was wired to G. C (common) had no wire. Blue was wired to R. Red was not connected when I took the panel off the wall. I think it may have gotten loose. So I put it on Rc which is jumpered to R.
I immediately wonder why the Blue wire is connected to R.



Now looking at the controller in the basement. The harness coming from the thermostat has the following connections. Blue goes to R. Green to G. Yellow to Y. The White and Red wires are not going to the controller, rather they go down into the blower/boiler. The Red and White wires that are connected to the controller seem to trace by to the A/C unit outside, though Im not 100 percent certain.





So my question is, is this wired correctly? Im confused on how to wire the new thermostat now because im a bit confused by looking at all this now. If this confuses anyone, I can try and explain more or even take better pictures.

Any help is appreciated.

Molson is offline   Reply With Quote
Old 07-05-2010, 06:24 PM   #2
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,509
Default

Thermostat to Controller Wiring


The red wire, was probably on the R terminal of the stat, not the RC.

You have a dual power source system. One transformer for heat, and one for cooling.

On new thermostat. Remove jumper from RH to RC.

beenthere is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Unexpected wiring found on existing thermostat mportobello HVAC 12 03-30-2010 06:11 AM
Problem with Lennox Pulse Furnace Wiring to Thermostat scalvin Electrical 4 12-30-2009 07:48 PM
Thermostat wiring question cpuken HVAC 4 12-14-2009 07:32 PM
Thermostat wiring jetmanaz HVAC 1 08-09-2009 07:13 PM
Wiring help - Honeywell Thermostat w/ Carrier Heat Pump Tom Williams HVAC 7 09-14-2008 07:40 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.