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Nowadays and this can be controversial so I will say it. I would now choose intergas, they have less parts to wear out and a 10 year guaranty on the boilers heat exchanger. But there are plenty of people with different opinions so just don't go for cheap get a band A rated boiler.

Well best of luck and lets hope that things do eventually get resolved.

You must have a bypass loop with a auto valve.

I then went onto thinking it could be a blocked vent pipe - so had a guy come out and put a smoke bomb down there. No smoke appeared in the house and the smoke was correctly drawing toward the vent pipe. The smoke eventually came out of our vent pipe - it did take a while though, but when it...

All this assumes you are gas safe registered and you are not. so cheaper to pay someone to sort out problem than electrocute or blow yourself up.

Because you have two motorised valves you should have a bypass loop as well, this takes water back to the boiler if both valves are closed and the pump is on. I suspect you don't have one or the gate valve on it is closed. It need to have an automatic bypass valve fitted on it that should stop...

The large tank in your loft is the head of water. Hight from top of water level to tap is head of water. as near as makes no odd 10 meters hight equals 1 bar of pressure, 5 meters equals 0.5 bar pressure, and so on.

The cause of noise is called water hammer, when a pipe is loose that is were the water hammer is converted to violent pipe movement which makes it bang. Washing machines and dishwashers have solenoid valves to turn the water supply off to the machine, this sends a shock wave along the water in...

Unfortunately you cannot service a gas fire with artificial coals unless you have the MI's instructions on where they should go, exactly. I have looked at my software for the manual and I don't have it, I have looked on line and it is not in existence. Therefore my advice is buy a new gas fire...

It needs a GSR to look at it may be overheat sat faulty but needs checking.

It shouldn't happen and it needs looking at by a GSR engineer.

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That is more likely than mine for sure.and good luck with that one.

Well said I agree.

And in my experience Ariston are not a very well made boiler, and not easy to work on either.

It would need to be going hot and cold for the cause I have given correction for. If it isn't getting hot and cool repeatedly then the thermistor is the other pos that was mentioned already. It sounds like classic case of sludge build up in the primary circuit of the secondary heat exchanger...

In New York I was in an apartment with about 25 apartments on 7 floors and they were all heated by a central boiler in the basement which heated them with steam. When the heating came on you could hear the steam condensing in the rads but nothing about rads creaking with sudden expansion...

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There are times when twisting the PRV and letting it slam back on its seating does stop it from leaking, but the best thing is to replace it, and make sure it isn't used for releasing system pressure again. The rubber seal gets a bit of grit embedded in it and that causes the leak, and from then...

It is a faulty bypass in the pump as you now know. New pump needed.