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In their defence, this is the first boiler of this type that the Corgi reg. plumber has installed and the electrician is a domestic installer who has only wired up a couple of boilers before, neither of them with an onboard programmer. I don't think either of them have been incompetent as they...

Thanks for all your help everybody. My husband has now decided to rewire this to our original external programmer, a Tempus 7, which has always worked well and which we are all used to. Can't believe it's possible to spend all this money on an expensive boiler only to find, after you have...

Thanks. I'm Merv's wife. I did reply to you yesterday but think I might have sent the reply meant for you to mikeyg instead and managed to upset him a bit, I think. We just could not understand why Vaillant did not say anything about using the vr65 when we spoke to them and told them...

o.k. thanks v. much for that. The installer did initially supply a mechanical programmer (one with the pins) but my wife said she wanted a digital programmer and this is what he and the suppliers came up with. Nobody's fault really I think. As you said, the electrician was a domestic...

It was installed by a Corgi reg. installer and wired up by an electrician. I did take on board what you said about ditching the 140 but Vaillant know the controls I am using and did not say that the 140 would not work with the system I have got. Obviously, I need to double check this with...

Not being the installer, don't really know. Would have been really helpful to have been instructed how to get the hot water only working. However, Not to worry, will ring Vaillant again on Monday.

Just to confirm, are you saying that this particular boiler will not operate on a hot water only setting without me purchasing the vr65 control centre? If I don't wish to go to this further expense, is the only way to get hot water by having the heating on as well? Thanks for your help.

Although I don't fully understand the boiler workings, the installer instructions for the Ecotec plus seems to indicate that I can use terminal 4 of the control panel to run 230v controls such as zone valves, programmers, room thermostats and cylnder thermostats, providing I remove the link...

I have a Vaillant 438 boiler, newly installed, and cannot seem to get the hot water to come on independently of the heating. I am using a Vaillant 140 programmer onboard the boiler, a Sunvic TLX7501 room thermostat, 2 x Honeywell diverter valve and an Ariston unvented indirect water cylinder...