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  1. #1
    Join Date
    Jul 2004
    Location
    Cherry Hill NJ
    Posts
    2

    Question

    trying to figure out whats going on with a rheem classic 90 +. It stoped worikng last week, I opened it up to check it out and didnt see anything wrong. came back later and it seemed to work fine.
    It died again yesterday and gave it another look, this time I looked at the manual and there was a referance to a blinking LED. the code for the said 1 HR lockout.
    The manual that was left does not explain the problem or cure for this.
    Anyone know whats up ?

    Thanks
    Sonny D

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,040
    I believe the new boards will lockout for several reasons. Repeated flame sense loss, repeated limit opening, possibly repeated pressure switch opening. Check flame sense current with a micro-amp-meter or if you don't have one, make sure the sense LED is on. Check temp rise and watch to be sure it doesn't open the limit.

  3. #3
    Join Date
    Oct 2003
    Location
    edgewood nm
    Posts
    73
    Check the flue and intake for debris. A slight drop in differential will cause a hard lock out, usually at this time of the year.

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