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Discuss Nest 3rd gen default to hot water on. in the Central Heating Forum area at

  1. RayPlumb

    RayPlumb Member

    Just had a problematic install of a nest 3rd gen. System is s S plan, wiring was a bit fiddly but got it done. Switched it all on and hot water cam on. Checked nest thermostat and hot water is set to off. Rechecked all working again and narrowed it down to heat link constantly calling for hot water. Phoned nest 30 min later after tech guy spoke to a few others. The thermostat has an antibacterial mode that switches water on if dormant.. presume also at inital start up. Can be disabled. Nest said it is a software issue they are looking in to.. 3hrs later. This is all new to me so thought i would post if anyone else having this problem..
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