Page 1 of 2 12 LastLast
Results 1 to 13 of 20
  1. #1
    Join Date
    Dec 2018
    Location
    Ventura, CA
    Posts
    113
    Post Likes

    carrier package unit error code

    Got a Carrier 48GPN030040301. Flashing a 7 code and inducer motor continues to run. Ive pulled the power off and on and it works fine for a day a day or two then its back to the 7 code. High limit? Rollout switch? Ive watched it run through a heat cycle and everything seems good.

    Thanks everyone.

  2. #2
    Join Date
    May 2018
    Location
    VA/DC
    Posts
    264
    Post Likes
    7 flashes in a roll out fault. page 14 of the install manual.

    inducer will run on roll outs and high limit trips. Which way is the wind blowing? is it possibly going straight into the flue discharge.

    did you check for a cracked heat exchanger?

  3. #3
    Join Date
    Dec 2018
    Location
    Ventura, CA
    Posts
    113
    Post Likes
    Thread Starter
    No wind. Unit same location for years. Checked burners. Observered flame while blower operating. No flame roll out or agitation.
    No evidence of cracked heat exchanger.

    Thanks

  4. #4
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    6,517
    Post Likes
    make sure air filters are clean , and look at the "return" grills in ceilings for caked up dust

    Ive even seen customers shove their own air filters into the grills then forgetting they are in there

    if nothing seen …. replace high limit and roll out …… one of them is going bad , and they are not expensive

  5. #5
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    31,655
    Post Likes
    I was taught many tears ago that the board itself can generate a 7 code, much like the Simplicity board can do with the 9 code.

    It's a roll of the dice if you need a rollout...which is cheap to do. For remote locations where I want to make sure the repair is once-and-done, I quote to replace the board, too.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  6. #6
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    11,361
    Post Likes
    Quote Originally Posted by navyguy1 View Post
    Got a Carrier 48GPN030040301. Flashing a 7 code and inducer motor continues to run. Ive pulled the power off and on and it works fine for a day a day or two then its back to the 7 code. High limit? Rollout switch? Ive watched it run through a heat cycle and everything seems good.

    Thanks everyone.
    How old is this unit?

    The induced draft motor “wheels” (small squirrel cage) on these are notorious for rusting out and not pulling enough air into the combustion chamber.

    Sometimes you can look into the exhaust opening (if the shield is missing or corroded) and see the condition of the wheel.
    Attached Images Attached Images   
    Instead of learning the tricks of the trade, learn the trade.

  7. #7
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    31,655
    Post Likes
    That's a good point. I was assuming that he had already looked at the inducer function......
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  8. #8
    Join Date
    Dec 2014
    Posts
    2,884
    Post Likes
    Possible Burner misalignment.

    Sent from my SM-G950U using Tapatalk

  9. #9
    Join Date
    Dec 2018
    Location
    Ventura, CA
    Posts
    113
    Post Likes
    Thread Starter
    Ok thanks guys. Ok here’s a possible smoking gun. When the weather was hot the ac would lock out as well. Occupant had to turn it off at the breaker and turn it back on.

  10. #10
    Join Date
    May 2018
    Location
    VA/DC
    Posts
    264
    Post Likes
    Quote Originally Posted by navyguy1 View Post
    Ok thanks guys. Ok here’s a possible smoking gun. When the weather was hot the ac would lock out as well. Occupant had to turn it off at the breaker and turn it back on.

    is there a phase monitor or any other safety that an be cutting it off? you need to check all voltage and tighten all the connections an be sure your power supply is solid. start there

  11. #11
    Join Date
    Dec 2018
    Location
    Ventura, CA
    Posts
    113
    Post Likes
    Thread Starter
    Quote Originally Posted by Cool breeze 38 View Post
    is there a phase monitor or any other safety that an be cutting it off? you need to check all voltage and tighten all the connections an be sure your power supply is solid. start there
    No Phase monitor. Ill check the connections. I did blow out the very dirty burner assembly and heat exchanger yesterday. Ill call them and see if its working still. Im leaning toward a bad flame rollout sensor because while it was running I just touched the sensor to see if it was getting hot and it instantly shut down and went into the 7 code.

    Thanks for your input

  12. #12
    Join Date
    Dec 2014
    Posts
    2,884
    Post Likes
    I don't think they go bad without being subjected to abnormally high heat though. It may not be enough to trip it for a few years but enough to weaken it.
    So there would still be an underlying problem me-thinks.

    Sent from my SM-G950U using Tapatalk

  13. #13
    Join Date
    Mar 2016
    Location
    NY
    Posts
    85
    Post Likes
    .

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
  •