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  1. #1
    Join Date
    Jul 2019
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    3
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    Is Goodman A30-00 handler blower motor speed changeable?

    Hello,

    I'm a new member of this forum.

    I need helps to solve my issue.

    I bought a new house and previous owner installed Goodman's A30-00 air handler for upstairs.
    I'm having freezing issue after running more than 2 hours. Previous owner had same issue and they hired technician and he refilled refrigerant so they did. However, I still have same issue and also I think this handler's blowing is really weak. I can barely feel any air stream from registers.

    Sometimes, this issue can be fixed with changing motor speed, so I checked wiring but it looked different from modern boarded circuit. I only found relays.

    Does anyone know about this handler and let me find out solution to change motor speed?



    Thank you.
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  2. #2
    Join Date
    Jan 2014
    Location
    New England
    Posts
    6,736
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    Did the Tech. find and repaired the refrigerant leak as far as you know? As you mention the same thing is happening. If it’s been repaired, call out a service Tech. Who knows electrical troubleshooting to check your fan speed system. Maybe the weak air flow is due to poor duct design and not blower speed.

    May just need a good Preventive Maintaince check also.

  3. #3
    Join Date
    Mar 2018
    Location
    Chico, Ca #StateofJefferson
    Posts
    1,855
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    Refrigerant charge should ALWAYS be checked after changing blower speeds as you’ve effectively changed the charge by changing speeds. Your evap coil may be frozen up killing your airflow, this can be caused by low charge ( a leak ) or low airflow. What is the size of the return duct and air filter?

  4. #4
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    7,291
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    Site rules prohibit giving technical advice, such as rewiring/changing blower speeds. This falls under DIY advice as noted at the top of the page.
    AOP Rules: Rules For Equipment Owners.

    Free online load calculator: http://www.loadcalc.net/


    There = not here. Their = possessive pronoun. They're = they are
    It's = contraction of it is. Its = the possessive form of it
    Too = also. To = expressing motion. Two = 2
    Then = after that, next. Than = indicates a comparison.
    Questions should end with a question mark "?" Statements end with a period "."

  5. #5
    Join Date
    Jul 2019
    Posts
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    Thread Starter
    Dear Makeitcold,

    Thank you for your reply.

    Previous owner recharge ref. last summer.
    Inlet filter size is 14x25x1, but actual duct is round (diameter smaller than 14").

  6. #6
    Join Date
    Jul 2019
    Posts
    3
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    Thread Starter
    Dear kdean1,

    Thank you for your notes.

  7. #7
    Join Date
    Mar 2018
    Location
    Chico, Ca #StateofJefferson
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    I could not find your model number, so I’m assuming it’s a 2.5 ton. Your almost certainly undersized on your return ducting and apparently you either have a refrigerant leak or they are overcharging it to compensate for poor airflow. Either way you’ve got a mess on your hands. Need to have the airflow measured, along with static pressure and a refrigerant leak check done.

  8. #8
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    11,839
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    Quote Originally Posted by Makeitcold View Post
    I could not find your model number, so I’m assuming it’s a 2.5 ton.
    I have the manual and you are correct.
    A trained Tech needs to evaluate this system.
    Diagnosing this system over the internet isn’t going to solve the problem.
    A tech needs to evaluate this system on site to determine if the coil and blower motor need cleaning before they proceed with any refrigerant issues.

  9. #9
    Join Date
    Dec 2002
    Location
    Houston,Texas
    Posts
    20,025
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    Maybe this heat here is getting to my head, but it appears the wiring in the first picture, is different than the wiring in the second picture.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law

    "When the teachers become unteachable we're all in trouble"

    "It's what you learn after you know it all that counts." ~ John Wooden



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