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  1. K

    Boiler seems to have 2 controllers !?

    Thank you for the speedy replies ! When I went into the house to check the Electricians work the house was like a Sauna, Siemens remote thermostat showing 27 deg ! £££ rising into the attic and through the (leaky) roof. I adjusted the Siemens remote down to a low setting, 15 deg, which should...
  2. K

    Boiler seems to have 2 controllers !?

    Hi, Have just bought a new (to us !) Bungalow. We have had the house completely rewired. We are not living in it at the mo due to other works required and I am working away. However the GCH is permanently on at max temp, I found it strange that there are 2 different Controllers wired in...
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