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Unless you have noticed a marked decrease in the water pressure & flow rate through your kitchen sink cold tap, it is very unlikely that anyone turned anything down. It is more likely that the heat exchanger is scaled up reducing the flow to a dribble and stopping the shower in its tracks...

How would you do that when you're not? It's a very easy thing to find out the cost of the items but be prepared to lose your installer. If you try and pare his already reasonable price to the bone, don't be surprised if he cuts every corner that he can.

Best give it another few minutes just to be sure.

You can fit a wireless cylinder stat in the airing cupboard and place the receiver wherever the zone valve is to be located. The range from the transmitter is about 30 metres for the Danfos one. You must of course never allow the open vent to become closed under any circumstances ever, at all.

I believe that some people believe that they are actually re-badged Vaillants - in their dreams :lol:

I'm happy to say that I've never knowingly given any decent advice to anyone :lol: :lol:

I'm not sure that I understand what you're saying, but I'll have a go. (1) The time-switch has been replaced and now works (2) You are getting hot water OK (3) You are not getting central heating I would suspect the zone valve (2-port) on the CH side. Check the switched live on the...

Yes, you are since you completely omitted the fact that the CWS will be drained via your method when the OP specifically asked "do I really need to drain the system?". Your post also implied that turning off the stop tap would also stop the HW flow. Your method needlessly deprives him or her...

If not a combi, what configuration do you have? "Y" / "S" plan.

You're new here then? :lol:

How does turning off the mains enable the stopping of the HW without draining the CWS? That's my main problem.

What?

Cheers newboy - much appreciated.

Probably a daft question and I will speak to Trevi tomorrow, but has anyone got any experience in a combi conversion where a Trevi Boost is already installed? i.e. will it work? what effect will it have on the boiler? Any info gratefully received. Ta Mike

Don't even consider giving them a tip :wink: Did you take references on this company before engaging them? What do they say about the current state of affairs?

Neither can I, especially when the boiler is being scrapped. Just one of the 95% I suppose. :wink:

There is probably a grub screw holding them in - usually at the back of the taap.

What? an under floorboard survey? What is that supposed to mean? as a previous poster said, the terms and conditions should have covered the possibility of either an existing and unnoticed leak on the OV system or the power flush (if any) exposing a latent defect. Are you suggesting that...

£750 to supply & fit a boiler, any boiler - I officially give up and will be applying for a job at Tesco tomorrow. What complete and utter nonsense. Even a non-RGI rogue trader serial offender will struggle to make a bean on this. Can anyone explain to me the point of spending £1000's each...

No one will be able to answer this without attending site with a manometer and a stopwatch and access to the MIs.