Iinnai tankless waterheater worked at first but now just barely warms water

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Jim Brokenbourgh

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Newly installed Rinnai tankless water heater V65e worked at first for a few days but now just barely warms water and will not display codes. what should I do now?
 
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Fitter30

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Have u rechecked the setpoints? Priority light come on with water running? If heater loses power before 6 hours of being powered up temp resets to 104*
 
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