I've done a bit more investigating this morning.....

The boiler fires up when I switch the heating and water on.
The cold entry pipe into the boiler is cold, as it should be.
The hot water pipe from the boiler is lukewarm.
The boiler itself is hot but not very hot as it usually is.

After about 5 minutes, the boiler then shuts down.

I am now wondering if there is an airlock in the boiler itself????

The cold entry pipe has a drain cock but there isn't one on the hot
pipe. I wouldn't be able to get rid of the airlock by draining water
out of the cold drain cock.

I wonder if it will be worth draining the whole system completely??

Any other ideas?????

Cheers

blister72




blister72 wrote:
Yep, I did that too - there was no air in the heating system
whatsoever.

blister72


Richard Polhill wrote:
"blister72" wrote in news:1122044859.947705.142380
@g49g2000cwa.googlegroups.com:

I then wondered if there is 'air' in the system or some leak? I've bled
all the radiators and thats was all ok. Checked the header tank and
plenty of water in there.


Have you bled the air from the system bleed valve too? usually it'll be
near the pump, valve, etc (in the airing cupboard) and will be a length of
copper pipe sticking up out of the system with a bleed valve on top. It'll
be higher than the pump, valve and coil.

Rich

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Rich P
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