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1. Override the Hot Water on the app for 1 hour.
   1. Click on the hot water zone on the app.
   2. Change the mode icon at the top-right to the Override symbol (3 arrows).
      1. If the hot water is an On/Off zone, select the override setting as ON.
      2. If the hot water is a temperature zone, select a much temperature higher than the current measured temperature.
   3. Ensure the duration is 1 hour.
2. Check the relay on dual/single channel receiver is active.
   
   1. A Single Channel Receiver shows a green light.
      
   2. Hold down the Hot Water button on the the Dual Channel Receiver (the light at the top-left with turn green for 2 seconds).
      
      
      

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   3. An Electric Switch shows a red light next to 'HUB'.
      
      

3. Check the boiler fires as normal and the correct zone valve has opened or pump is running.

   Info

   This confirms the Genius Hub has control over the hot water. If the boiler does not fire, the Cylinder Stat may be stopping the boiler as the Hot Water tank is already up to temperature. To test this increase the cylinder stat temperature temporarily, to check the zone valve opens and boiler fires. The cylinder stat must be returned to what is appropriate for the property after the test has been completed.