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 

IDEAL ISAR- NO CENTRAL HEATING


 
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
top banana

from United Kingdom

Joined: 20 Aug 2007
Posts: 24
Location: Cardiff,
United Kingdom

PostPosted: Mon Aug 20, 2007 8:33 pm Reply with quote

hello all,well i guess its that time of year when heating is switched on and problems occur!
have an ideal isar that is fine on hot water but doesn't supply heating.
i have overiden the radio signal from the thermostat but when the boiler has a 'c'on the readout the burner light flashes slowly but doesn't ignite.
any help please.
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.
corgiman

from United Kingdom

Joined: 25 Aug 2003
Posts: 10609
Location: Surrey,
United Kingdom
Thanked: 46 times

PostPosted: Mon Aug 20, 2007 9:38 pm Reply with quote

Bet you its the diverter valve
Back to top
 Alert Moderators
Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 27463
Location: Hertfordshire,
United Kingdom
Thanked: 4292 times

PostPosted: Mon Aug 20, 2007 10:11 pm Reply with quote

Indeed. can't remember what the rest position of the diverter is... but...
Back to top
 Alert Moderators
hav it

from United Kingdom

Joined: 12 Jan 2007
Posts: 694
Location: Manchester,
United Kingdom
Thanked: 6 times

PostPosted: Mon Aug 20, 2007 10:17 pm Reply with quote

dont they have that grey actuator box, that goes on at a funny angle, then twist and locks on..
Back to top
 Alert Moderators
Dan_Robinson

from United Kingdom

Joined: 01 Jul 2007
Posts: 27463
Location: Hertfordshire,
United Kingdom
Thanked: 4292 times

PostPosted: Mon Aug 20, 2007 10:21 pm Reply with quote

No, that as the later Honeywell. The earlier ones had a Cp diverter valve, which worked the same way but has a diferent manifold and actuator.

Easy enough to change as long as adequate space and proper servicing valves where fittted.
Back to top
 Alert Moderators
gas4you

from United Kingdom

Joined: 23 Feb 2007
Posts: 17554
Location: Norfolk,
United Kingdom
Thanked: 737 times

PostPosted: Tue Aug 21, 2007 8:40 am Reply with quote

My money would be on the pcb, as boiler is getting signal for heat as in 'c' but is not firing. If it was firing but no heat then I would go for DV. PCB is notorious unreliable on these.

edit, maybe the thermistor/ntc for the ch is knackered. Worth checking first.
Back to top
 Alert Moderators
Agile

from United Kingdom

Joined: 26 Jun 2004
Posts: 52156
Location: London,
United Kingdom
Thanked: 3251 times

PostPosted: Tue Aug 21, 2007 9:31 am Reply with quote

Since most of the internal operation is the same on DHW and Ch then its more likely to be the diverter valve.

With the boiler cold select CH and see if it fires up for 10-20 seconde to heat up the inside of the boiler.

The head can usually be taken off the diverter and the operating pin vigourously pushed up and down like external cardiac resusitation. That will often free it up for a few weeks!

Tony
Back to top
 Alert Moderators
gas4you

from United Kingdom

Joined: 23 Feb 2007
Posts: 17554
Location: Norfolk,
United Kingdom
Thanked: 737 times

PostPosted: Tue Aug 21, 2007 9:35 am Reply with quote

Yes but if the burner light is flashing slowly, then the boiler is thinking it is up to temp and just in circulating mode. OP says that it is going no further, fast flashing or lighting.

Another simple though OP, have you turned off mains for 30 secs at switched fuse outlet?
Back to top
 Alert Moderators
top banana

from United Kingdom

Joined: 20 Aug 2007
Posts: 24
Location: Cardiff,
United Kingdom

PostPosted: Thu Sep 06, 2007 8:28 pm Reply with quote

thank you very much for replies, i've just got back from summer hols and i'll keep you posted on resultsof your replies. thanks again.
Back to top
 Alert Moderators
the.ideal.man

from United Kingdom

Joined: 07 Aug 2007
Posts: 38
Location: Yorkshire,
United Kingdom
Thanked: 1 time

PostPosted: Fri Sep 14, 2007 10:49 pm Reply with quote

Dan_Robinson wrote:
No, that as the later Honeywell. The earlier ones had a Cp diverter valve, which worked the same way but has a diferent manifold and actuator.

Easy enough to change as long as adequate space and proper servicing valves where fittted.

we dont make that valve anymore, if you have seen any of the boilers this year you will know all copme with the grey head!!
Back to top
 Alert Moderators
top banana

from United Kingdom

Joined: 20 Aug 2007
Posts: 24
Location: Cardiff,
United Kingdom

PostPosted: Wed Oct 10, 2007 5:53 pm Reply with quote

well,had to get the sparkys in as nothing wrong with boiler but apparently problems with thermostat etc.
if i get a better low down i'll post it!
thanks for all your replies
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 
Ideal Isar M30100 - Constant Central heating? 2 80 Sat Dec 14, 2013 9:42 am
Central heating always ON- IDEAL ISAR HE-24 4 60 Tue May 01, 2012 9:12 am
Isar ideal he35 boiler central heating constantly running 3 980 Wed Sep 17, 2008 8:54 pm
Ideal Isar HE30 not heating water sufficiently. 6 360 Sun Mar 06, 2011 1:57 pm
plumbing and heating: wire a towerstat rf into my ideal isar 3 300 Tue Aug 17, 2010 3:40 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.