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Hi! I have a Vaillant VCW 242 EH that is still going strong. I have had some little issues with hot water. I would like to know if the pressure vessel that is connected to the water section needs to have any pressure put into it??? I know the newer water sections do away with this vessel but...

Hi! I am having an issue with my hot water on a Vaillant VCW 242 EH boiler. The shower has started suddenly going cold. I can see what is happening and wonder if someone can point me in the right direction! When the hot water is switched on the microswitch on the water section is activated and...

Hi! Does someone out there who knows these old boilers tell me, if I draw hot water, should this cause the diverter to move into DHW position regardless of whether the micro switch clicks in?? In other words, is it purely hydraulic action that moves the diverter valve into place??? And, if...

Hi! My Vaillant VCW 242 is working just fine on central heating, quiet as a mouse. When hot water gets drawn off though, it sounds like there is a lot of air gurgling in the boiler. Hot water draws OK! but I am just wondering what might be causing this gurgling noise. The auto air vent seems to...

Hi! I have an old Vaillant VCW 242 EH. Can anyone tell me if the small expansion vessel for the DHW should have a charge in it?? It is only small but there is a schrader valve on it and pressing it lets no air or water out. Should this be pumped up to a certain pressure?? Thanks! Phil

Hi! Can anyone point me in the right direction for what to look at? My Vaillant VCW 242 is driving my wife nuts (she is the one who likes hours under the shower) The shower has got to the point where you have to really back off the hot water (mixer shower) a lot to have it cool enough to stand...

Hi! Was just wondering if someone could shed some light on Vaillant VCW diverter valves. I have a VCW 242 EH and have noticed for quite some time now that the central heating only runs well if the knob is set around 6/7 or above. Set lower than this and the thing just modulates down really...

Hi! Me again with my trusty VCW 242 EH! :D Well, apart from the dip in DHW temperature that has been noticed lately! I am just wondering if anyone here knows about the DHW thermostats on these?? I have today pulled the wire off the DHW stat (leaving the NTC lead and the other lead on it) Out...

Hi! Can the people in the know here help me out? I have noticed recently that the DHW out of my old (trusty) Vaillant VCW 242 EH combi compact boiler is not coming out as hot as it did. I have just replaced the diaphragm pump as I got one really cheap (the old one had the split plastic...

Hi! Can anyone tell me whether it is possible to get a Water Section Repair Kit for a Vaillant VCW 242 EH??? I have a suspicion that the diaphragm may be going! Is there not also other seals that may need replacing?? I know I can buy the diaphragm seal (not sure which is the proper part No...

HI! I have an old Vaillant VCW 242 EH in my house running 6 radiators, 3 up and 3 down. I have just got around to controlling the system with a thermostat. I am finding that with the boiler set on 5 (about half way position) the boiler doesn't fire for very long at all before switching off...

Hi! I have finally got around to putting a thermostat on my system, a wireless Honeywell onto a Vaillant VCW 242. I have just wired the actuator into the boiler using the same connections as the old Honeywell timer went into. The manual I have for the boiler shows connecting a Vaillant...