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    Installing a NEST to a Vaillant Turbomax

    Hi all. Just followed MikeyD instructions from first page for a VUW GB 242 E Turbomax - worked perfectly. Old Honeywell thermostat has been left in situ, annoying, but it runs on 240v and couldn’t find an easier way to switch it to the USB voltage needed by the thermostat :/ Photos attached in...
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