Centrall heating not working after bleeding


Postby neilo » Sat Feb 16, 2008 10:35 pm

I have balanced some of the Rads today and found 1 rad was cool so i bled the system but unfortunately the bleed nipple in the rad came out - water squirted everyehwre .
Anyway bleed nipple back in OK and now the heating system refuses to start up - the boiler kicks in but then the overheat thermostat trips .
When system is left for 1/2 hour or so then boiler works for a while then clicks off again.
Water pump works but gets very hot with pipes eirther side of pump at lower temp - any ideas greatly appreciated .
Has to happen on the coldest night so far !!!!
neilo
Rank: Labourer
Progress to next rank:
25%
Posts: 2
Joined: Sat Feb 16, 2008 10:29 pm

Sponsor

Simply Build It

Postby htg engineer » Sun Feb 17, 2008 10:03 am

make and model of boiler, did you re-pressurise systm ? vented pump ?
if the pump gets very hot, then the pump is probably stuck.
htg engineer
Rank: Project Manager
Posts: 3224
Joined: Tue May 22, 2007 5:22 pm

Postby keitht » Sun Feb 17, 2008 4:35 pm

unscrew the pump cap and give the pump a turn or two. maybe air loci in pump causing boiler to shut down
keitht
Rank: Apprentice
Progress to next rank:
63.2%
Posts: 17
Joined: Sat Feb 16, 2008 4:23 pm

Postby neilo » Sun Feb 17, 2008 6:22 pm

Thanks Guys,
I checked the pump and it WAS stuck so I shut off either side removed the pump to check it and it was dry inside which bothered me - I then tentatitively checked the feed and no water which means the rad issue I had vented out all the water and i was left with an airlock - I cleaned the feed pipe out and loads of sludge came out but I then got water so had my feed back.
Put pump back in - circulated the system and now I have full heat again .
Thanks again for your help
neilo
Rank: Labourer
Progress to next rank:
25%
Posts: 2
Joined: Sat Feb 16, 2008 10:29 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics