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Old/New Rinnai Tankless controllers

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nquail
nquail Member Posts: 1
in Domestic Hot Water

Hello, I have a new Rinnai RE199eP replacing my old REU-V2532WC. Can I use my old Rinnai 45-4US controller as a remote on my new Rinnai RE199eP? Thank you.

Comments

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 10,757
    edited 12:43AM

    The answer should be in the I/O manual. Let me take a look

    EDIT:

    looks line you need a different part number for the newer water heater.

    Screenshot 2025-07-19 at 8.40.33 PM.png

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    Larry Weingarten

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