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  1. #1

    Help on a 1980 carrier

    I have a carrier unit that is giving me trouble. When the power is applied the inducer motor turns on and the spark for the pilot begins sparking. After the pilot lights the burners come on and seem to burn fine however they only stay on for ten seconds at best. I am stumped because I have already put in a new gas valve, three wire pilot assembly and rollout switch. I am writing asking for advice seeing as I am still fairly green in the field. I also dont want to keep throwing parts at this unit. Also customer doesn't want to replace unit at this time.

  2. #2
    Join Date
    Aug 2012
    Location
    NE wisconsin
    Posts
    402
    Keep throwing parts at it, you will have a new furnace one price at a time.

  3. #3
    Join Date
    Jan 2013
    Location
    California
    Posts
    87
    32 year old unit? I hope you performed a safety inspection on it before you took on liability for it. You touched it, now you own it...

  4. #4
    I looked it over before working on it and I know that there haven't been any issues with safety in the past. This unit is in my house and due to throwing $ into it I don't have the money to put in a new unit. It's pretty sad that I can fix others units but I can't figure out my own.
    Last edited by beenthere; 01-13-2013 at 06:58 AM. Reason: Price

  5. #5
    Join Date
    Jul 2010
    Location
    wisconsin
    Posts
    270
    Quote Originally Posted by tmryan1012 View Post
    I looked it over before working on it and I know that there haven't been any issues with safety in the past. This unit is in my house and due to throwing $350 into it I don't have the money to put in a new unit. It's pretty sad that I can fix others units but I can't figure out my own.
    I thought you saidthat customer doesnt want to replace the furnace, are you the customer or the tech or both?

  6. #6
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,585
    Quote Originally Posted by tiger man View Post
    I thought you saidthat customer doesnt want to replace the furnace, are you the customer or the tech or both?
    Or neither....
    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

  7. #7
    Join Date
    May 2007
    Location
    Central NJ Area
    Posts
    788
    Loose/bad/pooe groundr

  8. #8
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    6,806
    Did you check the heat exchanger for cracks?

  9. #9
    Join Date
    Feb 2010
    Location
    butler pa
    Posts
    1,073
    pressure switch ok ?

  10. #10
    That was my next option. I know it should have been done first but it is cast and the high limit isn't tripping. Any other ideas?

  11. #11
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,517
    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.

  12. #12
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,913
    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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    How many times must one fix something before it is fixed?

  13. #13
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,517
    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.

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