Baxi boiler noises

Hi Folks,
Trying to learn how to fix boiler problems or at least identify what the problem is before calling someone out! Go easy on me as I probably won't understand half of what you might say

I have a Baxi Solo 2 PF. I have hot water and radiators that work - so far so good. However, the water runs cold within 10-15 minutes of starting a shower. The worst thing is that when you reach temp setting on the thermostat for the central heating, as the boiler turns itself off it starts making a juddering/banging noise. The bolier sounds as though its turning itself on and off again and again. This has gotten even worse of recent. Does anyone have any ideas on what it might be, is there a quick fix for it (apart from turning off the heating) or am i doomed to fork out some hard earned cash to get it fixed? I've had a quick look at some of the posts on the site but not sure if they're the same thing as me
Thanks anyone for any help they can give.

Bagman

A lot of people who post here think that they can be told a one line fix.

The reality of the world is different !

It sounds as if your boiler is continuing to fire after a call for heat has ended. I dont know why in your case. Not because I am stupid ( others may disagree ) but because I do not have enough information to go on.

If I was at your premises then it would take me about 5-10 minutes to find the reason. On the internet it could take me a lifetime! I would suspect a problem may be a motorised valve fault.

You may still need a competent heating engineer.

Tony

Agile said:

It sounds as if your boiler is continuing to fire after a call for heat has ended. I dont know why in your case. Not because I am stupid ( others may disagree )

Click to expand...

who the heck would have to balls to disagree tony?????




I kid I kid

And Chris and Dan and Alex and I are having a meal out in Cricklewood, tonight, Tuesday, with DP whilst down on his visit from Scotland !

Tony

Bloody hell

thats a meeting of minds and no mistake.

Like to be on that table

Anyone with an anorak would be most welcome, as long as as you're prepared to give the little earthenware bowl your kulfi comes in to Tony, to add to his collection

Oh, that Baxi. One possibility is that it's short of water. Check for any air at a vent by the cylinder pipes (where the boiler pipes come in), also that there's water in the header tank, and that it flows into t he system when you do any bleeding (listen for tank refilling).

Otherwise I can't think of a common reason. Are you in a v hard water area? (HW cyl scaled up?)

there are several poss reasons for your bonking boiler - presumably it's better if you turn its stat down?

Thanks for the responses everyone, just to add some more bumf to my 'bonking boiler' issue:

-Yes, i think Berkshire is a hardwater area, just amazed that it could go from being quite as a mouse to as noisy as...well a noisy thing!
-Turning the stat down doesn't help at all - it still generates a hell of a noise
-When I bleed the radiators from time to time, water does come out, although I haven't checked the heater tank is making noises. I assume I'd have to leave it running for a bit to hear any noise?

As for the other things:
-Air by cylinder pipes where boiler pipes come in - not sure what you mean, call me stoopid
-Motorised Valve Fault, sounds serious if that is what one of the possibilities is!

Thanks all

Pump should over run when burner turns off, sounds like this might not be happening, but this wouldn't account for poor hot water.