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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Replacing a SW400 controller with a HoneywellST6400
I want to replace my broken Switchmaster 400 with a Honeywell 6400. The problem is that the SW400 puts on heating and water together. How can I get the ST6400 to put on both when I select Central Heating please.
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