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  1. #1

    furnace pressure switch range

    Hello. First post here.
    I have Rheem furnace. Its pressure switches, original (about 8-9 years) and replacement (3 years), don't seem to last. Rheem switch is spec'd at .30" WC, but I saw Lennox switch which has .31 WC. Does that .01" matter at all? I am hoping Lennox switch is better built. Thank you in advance.

  2. #2
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    mfg determine their pressure switch "range", to alter from mfg would violate UL listing of equipment

    you take the sole responsibility if replace with a different setting switch
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  3. #3
    Join Date
    Jun 2007
    Location
    Greenwood Indiana (Indianapolis)
    Posts
    420
    Quote Originally Posted by dandyme View Post
    mfg determine their pressure switch "range", to alter from mfg would violate UL listing of equipment

    you take the sole responsibility if replace with a different setting switch
    Dandyme is correct and pressure switches hardly ever fail. Here where I work, if a pressure switch is said to be bad, a senior tech goes out to verify. And its usually not the switch.
    As iron sharpens iron so one man sharpens another Proverbs 27:17 NIV84

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