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Surely the problem is that the boiler is inefficient. If it is swithching on and off every 5 mins then you have limescale build up, and the boiler is working double hard to heat the water. Theres my 5pence

MOD removed now behave

Well, I've had mine 6 weeks now, and a very slight improvement maybe.Mine is a BayHall model for £40. Its hard to tell, but the residue on my nice chrome mixer seemed to change consistency.... to less thick

Can anyone who has this boiler tell me if they have a rattling from inside the boiler when running hot water? PLEASE!

Mine ecotec pro has just done the same Been away for a few days to find the heating hadn't been on and a very cold house, It is fine when used regularly though, just seems to be when the system is idle for more than a day.

I think you've missed the point. I'm not going to fit anything, Vaillant are. Read the post, the engineer's totally unaware of what he can and can't use on his own companies products. I smell a rat! Thanks to all who have replied regarding the noises, i will persevere with those nuggets at...

Nope, as mentioned it says in the specs "Designed for use with all current Vaillant combination boilers (except ecoTEC), the VRT 340f thermostat is supplied with a small plug-in receiver unit, which fits neatly into the boiler fascia, with no wiring necessary. The thermostat remotely controls...

Thanks for the replies. The diverter valve is more of a problem as it sounds like it needs a good oil. I haven't got that much faith in vaillant as the timer unit has gone yellow. The engineer came with 4 new aqua sensors all of which made the rattling. Came back another time with an...

I have the eco-tec pro 28 boiler. I have a few issues which I am hoping someone here can either verify as abnormal, or have the same and are willing to put up with. Do you: 1) Have a rattling noise when full flow DHW is called. (I have verified with an engineer it is the aqua sensor "water...

cheers for reply. I believe it is a restrictor valve. It is a shared supply so I'm told its common to have these fitted due to higher pressure??

No disrespect but if she's anything like my mrs the immersions been on since day1!! Check to see if there is an electric switch in that cupboard, if so turn it off!

Water pipe into house has a restrictor valve on it which does make some rattling noise but I'm sure is not the cause of my problem I looks like an old lead pipe comes up from the floor of which a 15mm coper pipe feeds in to the combi into the floor above. When water is run there is a huge...

good flange down @ billeracy!

The reason I ask is that a plumber has just come, somehow he's managed to stop the leak but he's coming back on monday, so I'd like to be sure that when e fits the valve he adds inhibitor. Its a combi system.

just had the system drain down due to a leaking valve (LS) Will inhibitor need to be added?

Hey gas man chill! I enquired with vaillant as the specs say 15mm for my eco tec "pro"!. My RGI wanted to put 22mm in and I needed to know whetheer it was unnecessary work (floor boards - nice ones as well), however I listened to my rgi and now have a lovely supply of gas. As for Vaillant -...

look for cold water inlet valve on boiler (prob a slot head) and turn it up.

interestingly enough vaillant were quite happy with15mm going to the combi. Put in 22mm anyway. I have no faith in vaillant right now, their cust service is dire, or the communication within it.

I smelt the same yesterday, however mine is yellow in colour. is that the inhibitor?

If I open all the lock sheild valves will there be a detrimental effect on the heating system? I have a vaillant combi, si I assume the system is a closed loop? I have done this to try and erradicate some vibration from the boiler, and it seems to have worked, as the return pipe does not...