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    Unvented cylinder thermostat constantly on\off

    Hi, I have an old unvented cylinder in my flat and I've only ever used\needed the topup heater (top thermostat). I've tried the bottom one which supposedly heats up more water as it's lower, but doesn't seem to. As a comparison the top heater will get the water up to temperature then switch off...
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    Help explaining layout of Consumer Unit

    Hello, I have a Tenby CU as shown below. Out of idle curiosity I wondered if someone could explain the layout of it regarding the switches. I understand everything to the left of the RCD is protected and to the right is not, but... 1.) What is the double "Sub Circuit Switch" for? 2.) Why is...
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    Wiring options for replacement wired thermostat

    Hi, I have an old tatty Eberle thermostat that I never use. It's connected to the plinth heater in the kitchen. It would be nice to replace with something newer, but I'm not sure about the logic with the current wiring. It seems to be 3 phase without neutral so red, blue, yellow and earth...
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