cold water mixing with hot water

  1. Monguila

    Cold water mixing with hot water - Navien tankless water heater, NPE210A

    I have a Navien tankless water heater – NPE210A. Two weeks ago, the hot water started turning colder after one of two minutes in the shower. Navien’s support had me troubleshoot the issue as follows: 1. Turn the unit off. 2. Close the isolation valves to the cold-supply and...
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