After installing thermostat, heat/ac will not turn off


Old 03-21-11, 06:01 PM
Thread Starter
Join Date: Mar 2011
Location: USA
Posts: 1
Received 0 Votes on 0 Posts
After installing thermostat, heat/ac will not turn off

I just installed a Honeywell RTH2300 in my home to replace an old mercury unit. It appears to be somewhat working, but the AC/Heat will not shut off. For example, it is set at 75 and the ac keeps running down indefinitely. Also, when the thermostat is switched to the 'off' position, the heating/ac unit keeps running and stays on.

I have read the owners manual and installation guide cover to cover and nothing seems to jump out as something I did wrong. Any help would be appreciated!
Sponsored Links
Old 03-21-11, 06:39 PM
hvactechfw's Avatar
Join Date: Jan 2011
Posts: 6,245
Received 2 Votes on 2 Posts
ensure the bare wires are not touching each other
Old 03-22-11, 08:25 PM
Jay11J's Avatar
Join Date: Sep 2001
Location: Rochester, Minnesota
Posts: 18,427
Received 0 Votes on 0 Posts
If you see nothing touch one another. Remove the Y wire and see if it stops. If it don't then you may have a wire shorting out inside .
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:
Your question will be posted in: