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    Question about Vaillant combi flow rate

    I've got a problem with my VCW GB 242 EH being reluctant to fire up (not quite operating the microswitch when DHW is drawn; subject of recent post) I need to confirm whether the fault really is in the water valve section (diaphram etc) or conceivably the secondary heat exchanger being scaled...
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    Vaillant VCW GB 242 EH : Water section issues *URGENT* pls

    Excuse the "urgent" but I'm hot-water-less : The hot water supply has grown increasingly intermittent on my combi until now it rarely works. Central heating is fine. The cam by the servo valve isn't moving reliably, insufficient to operate the DHW microswitch. If the cam is "encouraged"...
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    Replacing heat exchanger in Vaillant VCW GB 242EH Combi

    Hi Folks, The plastic-housed secondary heat exchanger leaks so I have got a the recommended replacement 06-5034 which is a more modern metal plate type. It's supplied with a new set of pipework to allow it to fit, but I've heard that some adjustment of the control circuit (component...
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