Thermostat or Boiler Control Board


  #1  
Old 11-17-12, 05:44 AM
W
Member
Thread Starter
Join Date: Jun 2011
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
Thermostat or Boiler Control Board

I have a WM HE II boiler about 15 years old which I installed used in 2009. It has worked great since then. As the heating season came to Ohio I've noticed the thermostat "clicks on and off" when set around 70 degrees and boiler never actually fires up. The thermostat is by Hunter and requires a battery which we've replaced yearly. If I set the thermostat to 75 or so the boiler works.

So do you think the thermostat needs replaced or it it possible the control panel is gone on the boiler. (as I've read on some other sites)?

Any thoughts would be appreciated.
 
  #2  
Old 11-17-12, 05:58 AM
N
Member
Join Date: Jan 2012
Location: Canada
Posts: 2,743
Received 18 Votes on 16 Posts
What make and model is the t-stat?
If the t-stat clicks on and off at 70, it may be too frequent for the aquatstat to engage. Does it do this when set to 69'F or 71?
You noted that you change the batteries yearly, have you changed them recently?
 
  #3  
Old 11-17-12, 07:36 AM
hvactechfw's Avatar
Member
Join Date: Jan 2011
Posts: 6,244
Received 2 Votes on 2 Posts
I would be leaning towards the thermostat if it works at 75, but not at 70. Hunter makes great fans, not thermostats.
 
  #4  
Old 11-17-12, 07:38 AM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 4 Votes on 3 Posts
I've noticed the thermostat "clicks on and off" when set around 70 degrees
Rapidly? i.e. how much time between on and off clicks?

This doesn't sound right... my first suspicion would be the thermostat, but not sure I understand why it would work at 75 and not at 70... that's weird.
 
  #5  
Old 11-17-12, 09:57 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 62,677
Received 1,614 Votes on 1,486 Posts
This doesn't sound right... my first suspicion would be the thermostat, but not sure I understand why it would work at 75 and not at 70... that's weird.
If the temperature approached 75 in the house it would most likley start doing the same thing.
 
  #6  
Old 11-18-12, 03:20 AM
W
Member
Thread Starter
Join Date: Jun 2011
Location: USA
Posts: 3
Received 0 Votes on 0 Posts
The thermostat is by Hunter, the same people who make ceiling fans. It is not a digital display, more like the old style with a little arm you adjust the temp with.

As far as batteries, they've been changed recently.

The clicking is fast, just on then off.

One thing I noticed last night when I heard the thermostat "clicking on and off", when to the laundry room where the boiler is and when the thermostat clicks, I can hear something on the boiler click as well, then the thermostat clicks again, I hear it on the boiler as well.

But again, if I set the thermostat higher into the 70s, it runs just fine.
 
  #7  
Old 11-18-12, 08:01 AM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 4 Votes on 3 Posts
Get a new thermostat. That 'clicking' on and off will likely cause eventual damage to the relays in the boiler.

Hunter t'stats... not so good.

Try a Honeywell VisionPro.
 
 

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