tk3 turns on to often

Discussion in 'Tankless Water Heater Forum' started by dh100m, Jan 4, 2011.

  1. dh100m

    dh100m New Member

    Messages:
    1
    Location:
    ontario canada
    My takaki tk3 works fine but even when the toilets flush it turns on for 5 sec or so then shuts off
    I am on a well with average water pressure of 40lb The company did not respond to my inquiry
    any help would be appreciated
  2. zl700

    zl700 DIY Senior Member

    Messages:
    237
    Location:
    Texas
    The low pressure in the piping system causes the water in the hot side flowing backwards through the heater. After cold water draw stops, the piping system re-pressurizes including the hot water piping, causing brief flow through the heater. When this happens unit fires as designed since it senses flow through the tankless. A good spring loaded check valve on the cold water inlet of the tankless will solve this issue.
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