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Yup I think that’s a fair comment T. Bob

Could be the cell has got dirty give it a rub then try it. Bob

If you want to use your back boiler as well then you may think of fitting a neutraliser, and you may need to fit two boilers and an unvented tank or a heat store could be a path to go. Bob

I think you could try to undo the nut in the middle but you’ll have to use the old impeller as they are different sizes. It is usually the bearing gone which makes the noise. Bob

Easy job just unplug and plug in. Bob

Recharge it properly don’t leave it so long only till the water stops coming out then open nearest hot tap and recharge till water comes out then shut tap I’ve never had any trouble. Bob

Cor blimey. Bob

Also drop the pressure in the expansion vessel to 0.8 bar. Bob

Expansion hose blocked. Bob

Yep I like the sealed ones as well. Bob

Easy fix. Bob

If hi couldn’t do a better job than that I’d throw myself off a cliff. Bob

It could be the burner fan catching or in an extreme case which is unlikely it could be the fuel pump, take the panels off while it’s running and try to find where the noise is coming from. Bob

Have you got the right photocell you may need a digital one as there are now two types of cell. Bob

Needs a good service. Bob

Down the pocket half way along on the left. Bob

The one from overheat stat goes in first then the one from the boiler stat next. Bob

There is a good flow from hot tap so I’m thinking it could be primary or flow switch

The Dhw stat on the control panel as the heat store seemed to getting cold so it was changed I checked it and all was getting hot but customer phoned tonite and said it wasn’t working, so I’m thinking flow switch now. Bob

No they both go in the same hole if one is curly like a spring it goes in first then the other one after it. Bob