worcester 240 bf hot water overheats and cuts out

[deanscott3]

can anyone help my boiler cuts out after running hot water for a while and makes gurgling noises when running hot tap

 

[Agile]

It sounds as if it may be scaled up and/or have air in it!

Cutting out DURING hot water would usually be caused by over heating often caused by being scaled up!

But cutting out AFTER hot water would usually be caused by a failed pump over run thermostat.

Tony

 

[deanscott3]

it sounds like the gurgling is at the top of the boiler when hot water running is it possible air trapped in the gas to water exchanger?you can have a shower or run a sink of hot water but when you turn off boiler goes off as the boiler gets really hot to touch so the over heat stat cuts it off which as just been changed as well as a new pump and also the dhw sensor. how do you get rid of air or descale? thanks

 

[Agile]

What about the pump over run stat?

Those should be changed by a gas registered engineer.

It sounds as if the auto air vent is closed or jammed.

Tony

 

[kevplumb]

It sounds as if the auto air vent is closed or jammed.

of course it is they leak like a seive

 

[deanscott3]

hi tony
the auto air vent was changed it but noticed slight bit of water at the valve when looked before is this normal? not the pump stat though

cheers dean

 

[deanscott3]

last message didnt come through

 

[nickso]

check the pipework directly above the pump. classic place for these to block and cause noise/overheating.

 

[deanscott3]

checkin what way? dismantle?

 

[nickso]

yes.