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Here's a picture. When the spur under the programmer is turned on the green pump is on in the airing cupboard. Immersion is definately turned off and water is getting hotter from the tap as we speak. Boiler not on.

Hi. After many trips up and down stairs, I can't for the life of me work out what's heating my hot water. Have gas heating and hot water plus a backup immersion heater. I have turned the spur off for what I believe is the immersion heater in the kitchen and to double check also turned off the...