Thermostat


  #1  
Old 12-26-20, 08:13 AM
J
Member
Thread Starter
Join Date: May 2007
Location: New York
Posts: 273
Upvotes: 0
Received 1 Upvote on 1 Post
Thermostat


I have a thermostat question. My furnace will kick on and run even though the thermostat is at temperature. So I have it set at 67 degrees and it shows the room being 67 degrees but the furnace still went on. Why would this be? I changed the batteries in it about 2 weeks ago.
 
  #2  
Old 12-26-20, 08:43 PM
J
Member
Thread Starter
Join Date: May 2007
Location: New York
Posts: 273
Upvotes: 0
Received 1 Upvote on 1 Post
Figured it out.

I contacted Honeywell about the Thermostat and apparently it detects temperature fluctuations of a fraction of a degree. Therefore, the thermostat signals the furnace to go on after the temp decreases by 1/2 of a degree.

The crazy thing is, the rep told me on Live Chat that the thermostat is a "simple switch! It just turns the furnace on and off." Which is funny because my furnace is a dual stage burner and variable speed blower motor! And I've seen some thermostats do some crazy things to a heating system!
 
  #3  
Old 12-26-20, 08:51 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 71,664
Received 3,329 Upvotes on 2,988 Posts
Most thermostats process temperature in tenths of a degree.

66.5 - 66.6 - 66.7 - 66.8 - 66.9 - 67.0 - 67.1 - 67.2 - 67.3 - 67.4 - 67.5
This band of temps is all shown as 67.
 
  #4  
Old 12-27-20, 06:32 AM
Geochurchi's Avatar
Member
Join Date: Nov 2012
Posts: 5,624
Received 158 Upvotes on 144 Posts
Hi, how often is it going on and off, is it short cycling ?
Geo 🇺🇸
 
  #5  
Old 12-27-20, 07:27 AM
J
Member
Thread Starter
Join Date: May 2007
Location: New York
Posts: 273
Upvotes: 0
Received 1 Upvote on 1 Post
I wouldn't say it's short cycling. It runs a couple times an hour.
 
  #6  
Old 12-27-20, 02:06 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 71,664
Received 3,329 Upvotes on 2,988 Posts
A couple of times an hour is normal.
 
 

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