Nova Scotia Geothermal unit keeps cutting out

Discussion in 'Maintenance and Troubleshooting' started by Rakesh, Dec 6, 2018.

  1. Rakesh

    Rakesh New Member

    I have geothermal unit with 2 wells. Supply and dump wells. The incoming temp is 10•C and out going is dropping almost to 0•C and it cuts off
    Is it supply problem or the pump problem. Or too much pressure in the out well. If anyone can help.
  2. geoxne

    geoxne Active Member Forum Leader

    Lack of proper flow is is causing your HP to lockout on freeze protection. It could be the supply well/pump, pressure building up in the dump well or anything in between.

    First determine if supply well system is operating properly.
    Then make sure solenoid valve is opening completely.
    If everything else is normal, check to see if pressure is building up in dump well. A dump well should be vented to atmosphere to prevent pressure buildup. If water is coming out the vent, the dump well does not have the capacity at your flow rate.
  3. nc73

    nc73 Member Forum Leader

    My temporary pump and dump setup had the same issue. My hose was so long that it clogged at the end. I shortened it. Problem solved. If you have a pressure gauge hooked up before the heat pump you will see the pressure drop when it's flowing, and goes back to high pressure when it's clogged.

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