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My Boiler has started to make a horrendous noise, any idea what is causing this? https://drive.google.com/file/d/1lG85puq6PXK2zE5OLHi4emMj3h9IwaZv/view?usp=sharing

Thanks, thought so.

When the valve rotates the cam/cog arm should make contact with the microswitch. Should this contact be a momentary thing or should the microswitch be permanently engaged in order to fire up the boiler?

However, there is resistance when the system is powered up. Ahh so it is open and jammed at all times, just not operating the microswitch? Prior to swapping heads could I take the HW head off and manually try to open/shut the valve to free it?

OK, thanks for the input. I have powered down the sytsem completely and then I checked the lever on the valve head. I can push it across to the manual position without feeling any resistance and if I let go it does not return to the default position. When I do the same on the CH valve you can...

Thanks for that. Yes, I am competent. Well, I am with electronics. I presume you should check in the actual valve and that the valve to check is the one upper one in the pic?

Thanks for getting back to me. It looks like the former

Hi, For sometime, I have been having a problem where the hot water will only heat up if the central heating is on. I thought it might be related to my controller, which was definitely faulty, so I replaced it with a ST9400...

I have a HW ST699 which has partly died and I am wanting to swap it for a ST9400. Are there any guides on how to do this?

Just had a contact from a heating engineer, £125 + VAT per hour. This was quoting on a non urgent basis. Am I out of touch or is this a high?

Thanks for that advice. I believe that the pump is running though whether it is running correctly is another thing.

I didnt mean the cost of the radiators, I understand I would have to pay for those as that is a maintenance issue it is the collateral damage I was querying. BTW was it a big leak?

Thanks for that. "where this happens it is the homeowners' responsibility to pay for the repairs" In normal usage if a radiator sprung a leak you would pay for the plumbing repair and the home insurance the carpet etc, would that not be the case here? "as the Vaillant heat exchanger is...

Have I offended you? If I have I apologise. (though I have gone through the thread and cannot see why you would be offended but perhaps I am just being dim)

It has been serviced! But I have had to have a few valves etc replaced.

Citroen Can I ask why? Back to CH any suggestions? (My concern re leaks is that for some reason the installer/builder buried some of the pipework under a concrete floor and a cobbled hallway..)

posted in error

Ecotec 418 Not at all. But if a leak did occur would you expect my home insurance cover the cost of carpets etc, but not the repair?

Vaillant Ecotec plus, I think it is a system boiler. I would suspect that the system water is quite sludged as it is old and has no magnetic trap etc. The engineer is the engineer who fitted the boiler. Would it benefit from a powerflush? If so how often does that expose leaks and if it does...

I wonder if anyone can suggest a solution to my problem. I have had my Vaillaint EcoTec boiler trip out when in use. The boiler was installed 10 years ago and apart from a pump and valves having to be replaced in the last few years has worked fine. But now it has been coming up with an f24...