Page 1 of 2 12 LastLast
Results 1 to 13 of 17
  1. #1
    Join Date
    Jul 2007
    Posts
    65

    carrier burner lights sometimes

    Carrier 48dje064ca package unit with 3 burners. Gas pressures ok, pilot tubbing cleaned but, one burner (first stage) will only ignite when I hold hand over exhaust vent. Other burners run, same type of vendor motor on all 3 burners Anyone have an idea why by holding back exhaust it will allow burner to fire?

  2. #2
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    Is the wind deflector missing?

  3. #3
    Join Date
    Jul 2007
    Posts
    65
    Yes. They were all missing ang found replacements

  4. #4
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    Maybe a wind problem. I have made some wind deflectors out of sheetmetal.

  5. #5
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,338
    You have the post count. You should apply for pro membership. You will get a lot more answers.

  6. #6
    Join Date
    Sep 2006
    Location
    Ohio
    Posts
    469
    It could have a restricted orfice on the burner that doesn't light. You said this unit has a pilot tube, does the ignitor light the pilot at the burner that doesn't fire? The Carrier RTU's I usually work on have an ignitor with cross overs to light all the burners.

  7. #7
    Join Date
    May 2002
    Location
    evansville indiana
    Posts
    943
    Looketh for spider webeths in your orfices
    mikeacman

  8. #8
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,082
    Quote Originally Posted by mikeacman View Post
    Looketh for spider webeths in your orfices
    Check this. Very common on the carrier units.


    Sent from my iPad using Tapatalk HD
    Join http://scopeny.org/ Shooter’s Committee on Political Education

    The world is full of sheep,try not to join the flock.

    Support the Skilled Trades, Don't DIY

  9. #9
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,337
    Wow, that's an old Carrier to have a pilot tube. I haven't had a customer that is still running that era in over two years.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  10. #10
    Join Date
    May 2002
    Location
    evansville indiana
    Posts
    943
    Also spider webs in your pilot tube
    mikeacman

  11. #11
    Join Date
    Jul 2007
    Posts
    65
    The pilot tube had been removed and cleaned. You can see pilot flame along bottom of tubing, but peeters out when it hits top tubing(u bend) and doesn't seem to hit sensor to open main gas, until vent is plugged.

  12. #12
    Join Date
    Jun 2012
    Location
    Northeast
    Posts
    264
    check the heat excahnger for a crack in that tube.

  13. #13
    Join Date
    Jul 2007
    Posts
    65
    Heat exchanger changed in August, baffles included

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event