Hi ollski
Thanks for that but I replaced original wiring on boiler with new cable and copied original wiring colours,do you mean wiring on new heater control.
Thanks
hi all,
i've just replaced my Randall 103E7 timer with a Horstman H17 digital timer but now ,when timed to come ON its OFF,and when timed to go OFF its ON, :oops: What have I done wrong ? anyone please.