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    Viessmann Dekamatik hk1 (2 Posts)

  • Alw Alw @ 12:19 PM
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    Viessmann Dekamatik hk1

    I have a Dekamatik hk1 controller that controls a 4 way valve for my radiant heat in a concrete slab in my kitchen. The power light is lit but the readout panel is blank. The system is not working. Pump is not running. Any help would be appreciated.
  • Paul Pollets Paul Pollets @ 12:41 PM
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    How old is the unit? The screens will go blank when aged and there's no fix. Replace the Comfortrol programming unit. If your unit is under 2 years old, it's still warranted.
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