Worcester Combi

[confused 2]

My old [15years] worcester combi heatslave has started to rattle and bang when drawing hot water, can hear what sounds like gurgling a lot of air in the system, when this happens the pilot light goes out, can be relit after a while and can then go for days without a problem, suggestions please.

 

[chrishutt]

Pilot light probably cut out by overheat stat on heat exchanger. Check system pressure (if sealed) or water in feed tank (if open). Otherwise check through fault finding for boiler - can you be more specific about boiler model?

 

[confused 2]

Thank for your reply model is 9.24 system is open

 

[confused 2]

Just tried central heating and get the same result,noise is loud certainly sounds like overheating problem, but with central heating it shuts down in less than 60 seconds ????

 

[Paul Barker]

Has the float/ball valve in the feed/expansion tank stuck up? Force it down, make sure it's positioned perpendicular not at a slight angle, float isn't touching anything. Renew ball valve if you want. You may then have an air lock to clear, or it might just come glugging up the feed pipe.

 

[confused 2]

Thanks Paul I have looked at the tank does not seem to be a problem, will have a better look,I am in North Yorkshire, may have to call you???

 

[confused 2]

I suspect that the overheat stat is shutting the system down because the pilot light will not relight straight away,I assume it is waiting for cooldown before resetting??? water tank has water, any more ideas????

 

[ollski]

pump?

 

[confused 2]

pump?

Would this effect the domestic water side???

 

[ollski]

yep pump runs for heat and water, it should also have a pump overrun stat which may be playing up if the pump stops running at the end of a demand.

 

[confused 2]

Boiler now fixed, it was the pump!!

 

[BIG BOY]

well done ollski, i'll thank you even if the poster doesn't.

 

[confused 2]

BIG BOY Please see my post subject thank you!!!!