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I have a couple of questions:- (1) Why have you posted all in bold and enlarged text? is this supposed to attract peoples attention? (2) Do you really think a boiler costs more than a house?

Yes! they are talking nonsense. Incoming water temperature is currently about 10 degrees, the weediest combi correctly installed should give you 45 degrees at about 9 litres a minute.

Check that you are getting 230 volts to the grey wire to the 3 port valve. If you are, then it is likely that the valve is at fault. However, since the only change has been the stat wired in by you, it is more likely that you have introduced a fault in the system. Best of luck.

So you bought the cheapest stuff available.

The property is massive, about 16M*20M detached, metal single glazed windows, <50mm roof insulation, solid walls, two stories - have a go at working it out :) The last person who lived there died quite some time ago - from the cold I would imagine!

Hi all Can someone educate me about the following:- (1) What is the maximum heat that can be delivered via 22mm copper, or 22mm anything (2) At what point would one chose to go from 22mm to 28mm for a very large property? (3) At what point would you consider installing a second pump...

Same theory though. I always like to show customers the before and after difference and it seems that using an electronic meter is an easy way to do it. I also like to involve customers a bit and try and get them to do some work - so gadgets often help - you have no idea how popular a laser...

Exactly right :)

I reckon it's a pump of some sort that you need. Maybe one that pumps water around the whole of the house. Sorry, forgotten what they are called now.

Unscrew the head of the valve and you will expose the body. There will be a pin of some sort which should slide in and out. In it's fully in position, the valve is shut. So, try freeing it up.

Yeah, just cut out all that jargon and talk english! However in order to help I have de-jargonised this complete mess of a sentance:- Shut = closed To close = To shut off (see shut) Pressure = a force acting on something Pump = a spinny thing making a forcy thing Pins = little metal...

Total dissolved solids - anyone? anyone at all?

There's loads on here for this particular problem - try searching

Anyone got any opinions of which one to go for? Cheers

Nah, I think it would be quite safe.

A Suprima is a boiler which heats water. A Megaflo is a hot water cylinder which accepts heated water from a boiler. What possible justification could there be to answer "maybe" or "no" when asked whether the two will work together?

You haven't done anything wrong and I'm sure you will find someone to connect it all up for you.

It makes no difference that it is a combi. The installation, as others have already noted, is seriously flawed in a number of ways. The installer must, and will, rectify this if he or she wishes to remain CORGI registered.

Is there a cage around the flue?

Physics.