A DIY & home improvement forum. DIYbanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » DIYbanter forum » Do - it - Yourself » UK diy
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

Fuse blowing next to central heating clock



 
 
LinkBack Thread Tools Display Modes
  #1  
Old August 28th 07, 11:07 AM posted to uk.d-i-y
external usenet poster
 
Posts: 5
Default Fuse blowing next to central heating clock

Hi,
I'm a bit of a novice so please bear with me.

The fuse in the fusebox next to my central heating controller keeps
blowing. I replaced it twice yesterday with a 3A fuse and again this
morning with a 5A fuse and within half an hour of the heating coming
on and the radiators just starting to get warm it blows.

Has anyone got any ideas as to what the most common causes could be.

For info, it's a conventional boiler (not combi). It's a fairly old
Glo Worm system and it's a normal (not digital) mechanical clock that
it operates from.

Ads
  #4  
Old August 28th 07, 01:49 PM posted to uk.d-i-y
external usenet poster
 
Posts: 2,490
Default Fuse blowing next to central heating clock

In an earlier contribution to this discussion,
wrote:

Hi,
I'm a bit of a novice so please bear with me.

The fuse in the fusebox next to my central heating controller keeps
blowing. I replaced it twice yesterday with a 3A fuse and again this
morning with a 5A fuse and within half an hour of the heating coming
on and the radiators just starting to get warm it blows.

Has anyone got any ideas as to what the most common causes could be.

For info, it's a conventional boiler (not combi). It's a fairly old
Glo Worm system and it's a normal (not digital) mechanical clock that
it operates from.


You have an electrical fault which is causing current to flow from live to
earth. It's probably variable and intermittent in nature, but when the
leakage current exceeds the fuse rating, the fuse blows.

The fault could be at any of a number of locations in your system, but I
would start by having a critical look at the pump - that is the most likely
culprit in my experience, because that's where water and electricity come
closest together. If you feel competent, you can test it by disconnecting
its existing wiring and wiring it to a 13A plug with a 3A fuse in it. You
can run the pump without the heating being on, as long as there's water
going through it. If that fuse blows, it will confirm my suspicion - and you
will need to replace the pump.
--
Cheers,
Roger
______
Email address maintained for newsgroup use only, and not regularly
monitored.. Messages sent to it may not be read for several weeks.
PLEASE REPLY TO NEWSGROUP!


  #6  
Old August 28th 07, 09:09 PM posted to uk.d-i-y
external usenet poster
 
Posts: 2,466
Default Fuse blowing next to central heating clock

In message , David Hansen
writes
On Tue, 28 Aug 2007 03:07:36 -0700 someone who may be
wrote this:-

The fuse in the fusebox next to my central heating controller keeps
blowing. I replaced it twice yesterday with a 3A fuse and again this
morning with a 5A fuse and within half an hour of the heating coming
on and the radiators just starting to get warm it blows.


The fuse blowing is trying to tell you something. Find out what it
is, rather then hoping for the best.

Has anyone got any ideas as to what the most common causes could be.


In addition to the water suggestions, perhaps a cable or bit of
equipment is damaged.

Someone with more experience could measure and work out where the
fault is likely to be.


There's no way that most people would ever find this fault unless they
have been listening to my words of wisdom over the years grasshopper

It's a fairly subtle fault - the boiler switches on, the fan motor
starts up, the windings overheat and go short circuit, fuse pops,
windings cool down by the time you get round to measuring them and
revert to closer to a normal resistance

so, unless you are particularly on the ball, you won't find it

The opposite can also happen, some of them have resettable thermal fuses
which means that the fan cuts out and by the time you get around to
measuring the winding resistance, its back to normal

a devious cove is the fuelsaver fan

--
geoff
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
A/C Keep Blowing 3 Amp Fuse [email protected] Home Repair 9 June 19th 07 11:46 PM
Central Heating system blowing pumps! D Simmonds UK diy 6 January 11th 05 07:54 PM
Fuse repeated Blowing on Potterton clock/programmer jumblemo Home Repair 5 January 6th 05 01:01 AM
Fuse repeatedly blowing on potterton Boiler Clock/Programmer jumblemo UK diy 4 January 5th 05 11:45 PM
Central Heating problem - 2A fuse blowing in honeywell wiring box Andy Hall UK diy 9 September 30th 03 09:29 PM


All times are GMT +1. The time now is 12:50 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.SEO by vBSEO ©2010, Crawlability, Inc.
Copyright 2004-2014 DIYbanter.
The comments are property of their posters.