Heat doesn't come on after installing new thermostat

Reply

  #1  
Old 04-06-08, 11:16 AM
G
Member
Thread Starter
Join Date: Apr 2008
Posts: 2
Received 0 Votes on 0 Posts
Heat doesn't come on after installing new thermostat

Hi,

Ive changed our old thermostat with a new Honeywell touch screen one. After setting the new one up our heat wont come on when the display says its on. I first thought that I had blown a fuse or something (I checked that my circuit breakers hadnt tripped), but after putting the old thermostat back onto the wall, the heating worked again. I have since re-tried and again it didnt work with the new thermostat and worked with the old one.


Wiring for the old (working) thermostat:

Red wire - R
Blue wire - C
Yellow wire - Y
Orange wire - O
White wire - W2
Brown wire - E
Green wire - G

And here is the wiring for the new (not working) thermostat:

Red wire - R (R is joined to RC via a jumper)
Blue wire - C
Yellow wire - Y
Orange wire - W/O/B
White wire - AUX/W2
Brown wire - E
Green wire - G


One obvious difference is the R wire. On the old thermostat I only had R, on the new one I have R (heating power) and Rc (cooling power). The instructions that came with the thermostat say that R+Rc should be joined when there is only one transformer. (Please note I have also tried just R without the jumper to no avail. I have also tried our air conditioning with the jumper and it appears to be working, which is weird because it appears the red wire is working).

Any help is greatly appreciated!

Thanks

George
 
Sponsored Links
  #2  
Old 04-06-08, 12:40 PM
G
Member
Thread Starter
Join Date: Apr 2008
Posts: 2
Received 0 Votes on 0 Posts
I've resolved it! It was the factory settings that were wrong.

under fan control, 0 is selected:

0 = Gas/oil heat (equipment controls heating fan)
1 = Electric furnace (thermostat controls heating fan)

I dont have Gas or Oil - so I changed it to 1 and now it all works!
 
Reply
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


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: