DIYnot
Local | Network
   DIYnot > Forums
Local | Network
DIYnot Network Local DIYnot Network Local  
  Forum IndexForum Index     RulesRules    HelpHelp     Join FREERegister Free     About CookiesCookies     SearchSearch     LoginLogin 

Baxi 105e fault


 
Post new topic   Reply to topic    DIYnot.com Forum Index > Plumbing and Central Heating
Search this topic :: View previous topic :: View next topic  
Author Message
andy74rew

from United Kingdom

Joined: 08 Sep 2012
Posts: 2
Location: Newcastle upon Tyne,
United Kingdom

PostPosted: Sat Sep 08, 2012 10:12 am Reply with quote

I have a Baxi 105e and several times a day it will kick in (fire up the boiler but not the pump). It'll just sit there burning gas, heating the water in the boiler, not pumping with no demand for hot water or central heating.
The raidiators will eventually start to heat up as the water heats up.
This can be stopped by turning on and off a hot tap, it will then start again a bit later on.

Has any one got any suggestions/experiences with this?

Thanks

Andrew
Back to top
 Alert Moderators

If you do not want to see this advert, click here to login or if you are new click here to join free.
Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 29937
Location: Hertfordshire,
United Kingdom
Thanked: 4827 times

PostPosted: Sat Sep 08, 2012 10:21 am Reply with quote

Can't remember if these have a preheat.


If you run a bath do any rads start to warm up?

If the answer is yes to both, then you have a faulty diverter valve.
Back to top
 Alert Moderators
45yearsagasman

from United Kingdom

Joined: 14 Mar 2010
Posts: 5005
Location: Norfolk,
United Kingdom
Thanked: 845 times

PostPosted: Sat Sep 08, 2012 10:29 am Reply with quote

The 105e instant does have a preheat. If your boiler is this model then the preheat can be turned off on the control panel.
Back to top
 Alert Moderators
andy74rew

from United Kingdom

Joined: 08 Sep 2012
Posts: 2
Location: Newcastle upon Tyne,
United Kingdom

PostPosted: Sat Sep 08, 2012 10:46 am Reply with quote

There isn't a per-heat function. The boiler sitting there with no demand at all will just kick into life and just start burning gas for the hell of it. The pump doesn't start. There aren't any fault codes.
Back to top
 Alert Moderators
stew1

from United Kingdom

Joined: 25 Sep 2011
Posts: 12
Location: Durham,
United Kingdom
Thanked: 3 times

PostPosted: Sat Sep 08, 2012 11:09 am Reply with quote

the symptoms you describe should be not be possible the pump is proven by a microswitch which must be made before the boiler can ignite
Back to top
 Alert Moderators
Agile

from United Kingdom

Joined: 26 Jun 2004
Posts: 53497
Location: London,
United Kingdom
Thanked: 3405 times

PostPosted: Sat Sep 08, 2012 11:13 am Reply with quote

It sounds tome like an intermittently faulty DHW demand switch!

Tony Glazier
Back to top
 Alert Moderators
Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 29937
Location: Hertfordshire,
United Kingdom
Thanked: 4827 times

PostPosted: Sat Sep 08, 2012 11:33 am Reply with quote

sounds to me like the op is making assumptions.

if the burner is firing for more than a few seconds without the pump running the boiler will be banging and clattering. the rafs wouldn't be heatimg up, amd it will overheat giving the respective lockout indication.
Back to top
 Alert Moderators
gas112

from Unknown or unspecified country

Joined: 27 Oct 2009
Posts: 8563
Location: Unknown or unspecified country
Thanked: 2016 times

PostPosted: Sat Sep 08, 2012 3:20 pm Reply with quote

The pump will be running otherwise the boiler would sound like someone hitting it with a hammer .
Choice of 2 faults microswitch or pin sticking on divertor after HW demand or the in built frost stat is faulty
Back to top
 Alert Moderators
Search this topic :: View previous topic :: View next topic  
Post new topic   Reply to topic    DIYnot.com Forum Index > Plumbing and Central Heating All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Similar Topics   Replies   Views   Posted 
PCB fault on baxi 105e 5 420 Wed Jan 06, 2010 9:51 pm
Baxi 105e intermittent fault 10 260 Mon May 16, 2011 11:34 am
Baxi 105e pump low pressure fault - PCB? 5 960 Wed Jan 13, 2010 11:53 pm
baxi 105e boiler fault 12 280 Sat Oct 11, 2014 1:00 pm
Baxi 105e Combi Boiler fault 12 220 Thu May 15, 2014 8:00 pm


 
DIYnot
Find an Expert | Find a Supplier | Search DIYnot.com
Network | Advertising | Newsletter
DIY | DIY How To | @home | DIY Wiki | DIY Forum
By using this site you agree to our Terms of Service / Disclaimer.
Please read our Privacy Policy. Copyright © 2000-2014 DIYnot Limited.