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Thread: Rinnai Tankless REU-V2520-EFU. Water isn't as warm as it used to be.

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  1. #1
    DIY Junior Member jimsinoregon's Avatar
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    Default Rinnai Tankless REU-V2520-EFU. Water isn't as warm as it used to be.

    Rinnai Tankless REU-V2520-EFU. (4-6 years old) Water isn't as warm as it used to be. Any ideas what might be causing this? Any suggestions on how to remedy it?

    I did notice that the installer used a bathroom controller to control the unit, which limits the temperature to 120 degrees (instead of a master controller that allows temps up to 140 degrees.

    Thanks in advance,

    Jim

  2. #2
    Master Plumber master plumber mark's Avatar
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    you probably need to have it de-scaled if it is not too late....

    have you ever had it done???

    it is supposed to be de-scaled at least once a year or it voids your warranty....

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