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  1. #14
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,399
    Quote Originally Posted by tmryan1012 View Post
    That was my next option. I know it should have been done first but it is cast and the high limit isn't tripping.
    I'm not following how the pressure switch being "cast", and the high limit "not tripping" are related?

    anyway..........

    be sure you test it (the pressure switch), before you replace it. Remember, a VOM and manometer are your friends.
    Instead of learning the tricks of the trade, learn the trade.

  2. #15
    Join Date
    Dec 2011
    Location
    Twin Cities Minnesota
    Posts
    224
    I had this same issue last year. system may have been running this way for years. I too replace and checked everything,and was also working with "Tech support". I finally advised customer to get an authorized Carrier Dealer tech to take a look at it. He called me back a few days later to a bid on a new furnace..,he said they could'nt figure it out either! The moral of this story.,5hours labor..,3 trips..,did not make a penny! And the "Bid" didnt get it! Good Luck!

  3. #16
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,778
    Quote Originally Posted by rundawg View Post
    I'm not following how the pressure switch being "cast", and the high limit "not tripping" are related?

    anyway..........

    be sure you test it (the pressure switch), before you replace it. Remember, a VOM and manometer are your friends.
    I think he means the heat exchange is cast. And since the high limit is not ripping he didn't check the HE.
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  4. #17
    Well I think my plan of attack is to recheck the pressure switch again and recheck the high limit switch again. Im also going to pull the blower motor and control board so I can slide inside the bottom of the unit to see if I can see any part of the heat exchanger. Thanks for the help. I will let y'all know how it goes.

  5. #18
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,399
    Quote Originally Posted by beenthere View Post
    I think he means the heat exchange is cast. And since the high limit is not ripping he didn't check the HE.
    Got it. I stood up on my chair and it finally sunk in what he was saying.

    Thanks.
    Instead of learning the tricks of the trade, learn the trade.

  6. #19
    Join Date
    Aug 2012
    Location
    NE wisconsin
    Posts
    402
    I was standing on my toilet when I finally got it.

  7. #20
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,512
    Quote Originally Posted by philjafo View Post
    I was standing on my toilet when I finally got it.
    Seat up or down?
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  8. #21
    Join Date
    Aug 2012
    Location
    Palmyra, Missouri, United States
    Posts
    224
    im gonna guess its the fusible link. that breaks one of the wires to the three wire pilot.

  9. #22
    Join Date
    Aug 2012
    Location
    NE wisconsin
    Posts
    402
    Seat down of course, last time I was high on pot my foot slipped and went into the bowl had to spend the rest of the day with a stinky shoe. Not fun

  10. #23
    Join Date
    Nov 2011
    Location
    St. Louis
    Posts
    3,238
    whut da hayell?

  11. #24
    Join Date
    Feb 2004
    Posts
    2,458
    Won't be the fuse link, that puts blower into continuous operation and nothing else.
    hmm got to think a bit. Have you tried bypassing thermostat?

  12. #25
    Join Date
    May 2007
    Location
    Central NJ Area
    Posts
    788
    Loose/bad/pooe groundr

  13. #26
    sorry, if I sound like an idiot, but no way in hell I would be liable trying to fix a 1980 carrier furnace... No way I would drive away from that thing knowing nothing bad could happened after I touched it...

    I would replace it, or have someone sign a non warranty/non liable agreement... I am guessing this a joke/troll thread or something...

    After that said, I would not be suprised if its shutting down due to some kinda safety switch.. Lack of CFM, etc.

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