Anyone experienced with Worcester Greenster HE Combi

[Plucky]

As above, customer reports that when he opens hot water tap boiler rockets up to 90 odd degrees and locks out.

Now he says heating is messing about as well. he said boiler had no pressure so topped up to 1.5 and just before its locking out its going up to 3/3.5 bar.

Im thinking primary side of plate heat exchanger may be block or sludged up but would this affect heating side? Or could it be 2 problems.

Maybe pump playing up as well?

 

[Billy Bob Bob]

have you tested the pump?

 

[Plucky]

I havent even been there yet! Just trying to prepare best as possible.

Ive been a pure installer for 8 years and now i'm self employed kind of picking up the breakdown and fault finding as I go.

 

[Billy Bob Bob]

right take the center out of the pump try spinning it,if its seized theres your fault failing that if the pump looks/sounds dead put a meter on it full mains replace pump

 

[Plucky]

cheers

 

[Billy Bob Bob]

try that and go from there really,if its not that run it up see what it does dont take customers word for it they do miss/invent stuff went to one today told that the dhw goes hot and cold was told when i got there it does not go hot and cold its luke warm in the bath turns out that they have a gravity large spout type mixer on the bath and they are opening the tap full its only a 24kw combi and they have only had it for 7 years....people