Boards.ie uses cookies. By continuing to browse this site you are agreeing to our use of cookies. Click here to find out more x
Post Reply  
 
Thread Tools Search this Thread
24-01-2020, 21:13   #1
Sofiztikated
Registered User
 
Sofiztikated's Avatar
 
Join Date: Nov 2008
Posts: 6,722
Heating coming on at random times, when timer is off

I've a weird one.

Oil central heating comes on at random times, even though the clock is set to OFF. I've went through and turned any set times to off, but still randomly coming on.

I'm not complaining that the house is warm, but if it's burning oil when I'm not there, then it's a bit daft.
Sofiztikated is online now  
Advertisement
24-01-2020, 21:23   #2
John.G
Registered User
 
John.G's Avatar
 
Join Date: Apr 2018
Posts: 1,346
If your house is zoned then its more than likely that one of the zone valves is faulty as its this (these) that give the run signal to the boiler.
John.G is offline  
24-01-2020, 23:51   #3
wiz569
Registered User
 
wiz569's Avatar
 
Join Date: Nov 2006
Posts: 1,444
Quote:
Originally Posted by John.G View Post
If your house is zoned then its more than likely that one of the zone valves is faulty as its this (these) that give the run signal to the boiler.
But doesn't the clock/programmer need to send a live signal to the zone valve first?
wiz569 is online now  
25-01-2020, 00:58   #4
John.G
Registered User
 
John.G's Avatar
 
Join Date: Apr 2018
Posts: 1,346
Quote:
Originally Posted by wiz569 View Post
But doesn't the clock/programmer need to send a live signal to the zone valve first?
It does but the actuator head often doesn't close the valve when it developes a fault and it's end switch is still made which gives the run signal to the boiler. It's a fairly common fault and sometimes the zone with the faulty actuator will continue to heat. You will generally feel a good spring resistance when manually opening a de enerized zone valve.

Last edited by John.G; 25-01-2020 at 08:45. Reason: spelling
John.G is offline  
(2) thanks from:
25-01-2020, 01:39   #5
CoBo55
Registered User
 
CoBo55's Avatar
 
Join Date: Feb 2019
Posts: 1,559
Frost stat if it's an outdoor boiler.
CoBo55 is offline  
Post Reply

Quick Reply
Message:
Remove Text Formatting
Bold
Italic
Underline

Insert Image
Wrap [QUOTE] tags around selected text
 
Decrease Size
Increase Size
Please sign up or log in to join the discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search



Share Tweet