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Why is my hot water coming on whwn i start heating ?

I have noticed that when i trigger the heating on my system, it also heats the water. No water light comes on from the Receiver. My previous set up was

Boiler Baxi 800 Condensing boiler

Previous thermostat controller - Drayton Lifestyle LP722

Any advice would be appreciated

Answers

  • wateroakley
    wateroakley Volunteer Moderator

    @ghindle Hello. In an S-plan or Y-plan heating system, i'd be suspicious of a faulty hot water zone valve.