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  1. #14
    Join Date
    Mar 2016
    Location
    NY
    Posts
    87
    Post Likes
    Check to see if there are any fibers in the inducer wheel. I’ve solved many rollout trips on carriers due to huge fiber build up in those inducer wheels. Remove the inducer and take a small flat head/t stat screw driver and clean the fibers out.

    And make sure the burners are aligned. Some carriers techs I’ve noticed tend to use the gas line as leverage and pops the burner manifold up on the far end causing nuisance rollouts.

  2. #15
    Join Date
    May 2018
    Location
    VA/DC
    Posts
    266
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    Quote Originally Posted by navyguy1 View Post
    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
    if you hardly touched it then you need to take a temp reading right at it. its either getting to hot or faulty. the comments about checking the fibers in the inducer wheel is good advice also.

  3. #16
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    31,739
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    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.
    This is not related to heat operation.

    A cooling call does not require board activity other than the fan via the IFO terminal on J2, but the Y calls run externally to the board in cooling. The G call invariably passes through to the IFO when present at the board.

    So no...the likelihood of these two problems being related is so small that I have never seen it.

    The next set of values to be considered is what makes the unit fail in cooling mode. If it is fan related, such as an evap coil freeze up or a high or low pressure lockout due to a CLO board, then you have to identify that cause. In heating, a fan failure would cause the blower compartment limit to open, which is a different heat failure mode than the rollout.


    HTH.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

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  4. #17
    Join Date
    Nov 2011
    Location
    East Side
    Posts
    6,856
    Post Likes
    one more thing to consider on intermittent trips is to also watch it running with all the panels in place. could be something that only happens with it all closed up.

  5. Likes icy78 liked this post
  6. #18
    Join Date
    Dec 2018
    Location
    Ventura, CA
    Posts
    117
    Post Likes
    Thread Starter
    Ok thanks everyone.
    As I mentioned I blew out the burner assembly and heat exchanger last Thursday and Friday the occupants said the heating was working again. Probably a bit pre mature but I blew a ton of crud outta the unit so maybe that was the only problem. A few more days and Ill know for sure.

  7. #19
    Join Date
    Dec 2014
    Posts
    2,896
    Post Likes
    That thing is probably 2 stage? It might be under fired and causing condensation and rust.

    Or the return air is too cold or too much outside air making the return are too cold. Or it's a carrier.

    Sent from my SM-G950U using Tapatalk

  8. #20
    Join Date
    Dec 2018
    Location
    Ventura, CA
    Posts
    117
    Post Likes
    Thread Starter
    Definitely not 2 stage..
    From my point of view it’s just a lack of PM. never been cleaned or serviced being installed 10 plus years ago.

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