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Can any one help? Followed wiring instructions for combi boiler to extension but heating doesn' come

Can any one help? Followed wiring instructions for combi boiler to extension but heating doesn't come on when called.

Sure its something to do with the wiring as rewired the old thermostat back in & boiler fired up no problem. All devices paired successfully.

Please see pics of before & after. Any advise would be much appreciated.


Answers

  • An update - Tado very responsive and told me that the previous programmer was a single channel one and you have a combi boiler, so they assume that you were not controlling hot water before. If that is the case, in our Extension Kit, the wire that is currently in terminal 3, should be in terminal 4. 

    This worked instantly. Thanks!

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