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try a water hammer arrestor. It's like a mini expansion vessel which accomodates excessive pressure fluctations etc

Either that or dhw flow switch sticking.

wot model is it? 80e,80sp, or 96e?

C isnt a fault, thats the boier user control panel telling you there'a a demand for heating. C heating, D hot water. T hot water pre-heat. I'd say either faulty timer, room stat or your diverter is sticking

It has to be wired wrong, or a connection either in wiring centre or on back of programmer is loose an touching somet it shouldn't do. the electrical side is like one big circuit. you break supply you lose power, your by-passing controls somehow. hence incorrect or badly fitted connection

I could be wrong, and usually are :lol: But Most combi's now are of a moduluating type! Overgassing doesn't present a problem as zero governor on gas valve, or pressure regulator on standard gas valve regulates gas pressure to operating requirements! Over gassing tends to give a you a boom...

Is this a job your planning on doing or getting an RGI to do? LPG still requires ACS qualification and CORGI registration!!!

It's quite possible that the three port is not fully closing so your getting hot water still passing by the valve even tho it's supposedly off. But saying that, have you got the hot water switched on or off when your still getting heating?

It could be some of the leads have worked loose on the flame sensing electrode or the electode postion. If it aint these more likely a flame sensing elecrode or p.c.b that has gone.

do you get any neons flashing at you big kenny?

It's not corgi regulations you are contrivening it's the GSIUR. GAS SAFETY AND INSTALLATION, USE REGULATIONS. Which clearly states no person who is not registered with an approved regulatory body(CORGI, for the time being) shall carry out work on a gas carrying pipeline, or an appliance which is...

personally i'd fit the Vaillant Eco plus 415. Much better bulid quality. An german, as much as we don't like em. There bloody good engineers. :( As for the (far from) ideal's. There an gas fitters/engineers nightmare. My previous firm insisted they were fitting by the installation guys. That was...

It could be the central heating/ direct hot water temperture probes are faulty and causing an open circuit. Hence boiler tripping out cause of no way of dissapating heat. The over heat stat is not calibrated right. Ariston's are overly complecated boilers. :x either ring them up or get a RGI to...

Mirco bore copper is notorious for this kind of problem. :evil: unfortunatly by the sound of it you've bent the pipe. (even the slightest of kinks will cause it to **** out :cry: ) and by keep tightening it you've crimped the pipe with the olive. best thing to do is cut it off and insert new...

As dave says, use the correct industry standard room sizing chart for heat losses, etc. try www.radcalcs.com. Column radiators don't throw out as much heat as convector type radiators. So failling the above website try a reputable plumbers merchant (not B an Spew who'll sell sand to arabs, just...

hello, Grohe do a nice range of bar mixers (1000,2000and 3000) which can be either installed as exposed pipework or chased out an passed out through the wall and tiles etc.The set comes with both type of fittings in it. personally from a plumbers point of view i prefer the exposed as any...

You do right, both myself and the company i work for fit vaillant's, and many a happy customer have we had. No other company i know rings you up and tells you the product you fitted X amount of months, years ago has a problem and they've been out an replaced the said product.

Firstly Does the shower blow the main fuse out at R.C.D? Second. do you get a low water pressure warning light come on? If so have you checked hose and main inlet filters. (possible crap stuck to them, blocking flow)

It stands for Printed Circuit Board. And if like you say, you've got no leaks etc I wouldn't go poking around in there. Your'll void your guarntee. Ring Monsoon up who'll probably ask you to go through some fault finding sequnces so have a multimeter handy. If that fails they'll send an engineer...

As i',ve recently installed the same. apart from mines the 310litre aurostor system in my house, i opted for the 24 kw option because as you say running the boiler flat out conserves energy due to return temp of the heated water on the secondary heat exchanger. baring in mind tho as you so...