GEEEZ Another Issue

Reply

  #1  
Old 12-14-13, 06:01 AM
Member
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 182
Received 0 Votes on 0 Posts
GEEEZ Another Issue

Well I posted a thread about T stats and I plan on replacing them. Now I think one of mine has an issue and if someone could confirm my suspicions I would feel a bit better. It is a cheap mechanical stat with a mercury switch. I am having an issue with short cycling. I have the cover off so I can see the mercury switch in action. The switch will tilt on and call for heat and the boiler will kick on and fire, within a minute or so I can physically watch the mercury switch tilt back to the off position and turn the boiler off. This will happen several times an hour. I think the heat anticipator is bad and causing the stat to turn off the boiler.

IIRC this same issue happened when we first built the house with the same type of stat. Does this make sense?
 
Sponsored Links
  #2  
Old 12-14-13, 06:56 AM
Member
Join Date: Jun 2012
Posts: 917
Received 3 Votes on 3 Posts
You should be able to adjust the anticipator, move the lever towards longer.
 
  #3  
Old 12-14-13, 06:59 AM
Member
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 182
Received 0 Votes on 0 Posts
I moved it to the next setting with the same results. It was also working fine for the past 10 years and this just started happening a day or 2 ago.
 
  #4  
Old 12-14-13, 08:53 AM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 3 Votes on 2 Posts
Either anticipator has somehow took a dump, or something in the thermostat circuit is drawing too much current.

What is the thermostat 'driving'? Zone valve?
 
  #5  
Old 12-14-13, 10:37 AM
Member
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 182
Received 0 Votes on 0 Posts
Yes a Zone valve. I switched it with one from the bedroom and it seems to be working. I just got home with the new ones.
 
  #6  
Old 12-14-13, 04:30 PM
Member
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 182
Received 0 Votes on 0 Posts
Installed the 111B Honeywell and so far so good
 
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: