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  1. #1
    Join Date
    Nov 2016
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    Ice up Problems with Howard/ mccray

    Howard/ Mccray
    M# RIf4-24-led
    SN#17-42225-04
    4 door Freezer

    My problem is that this unit tends to freeze in the back middle of the evaporator and cause the middle product to defrost. about every 2 months and only happens in the middle,

    Product of the left and right still remain frozen.
    -Freon (404A) is full
    -Timer works 2(12am,12pm) defrost for 30mins (two 30min defrost is the max according to Technical service )
    -Heaters work
    -gaskets are good
    -doors shut closed
    -fans turn off as soon a it goes into defrost and turn back on as soon as the coil gets cold enough
    -has a drain with trap and a small pencil heater in the drain
    -the product is meat but all vacuumed packed

    i have completely defrosted the coil each time but not sure why its just the middle part ices up
    Could use some advice maybe something i cant seem to think of.
    Thank you

  2. #2
    Join Date
    Jan 2010
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    Confirmed all fans running the correct direction ?

  3. Likes UmmScott liked this post
  4. #3
    Join Date
    Nov 2016
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    Thread Starter
    Yes all fans run the same direction

  5. #4
    Join Date
    Jan 2010
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    Anything in the air pattern, ie. TEV or solenoid ?

  6. #5
    Join Date
    Nov 2016
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    Thread Starter
    did a smoke test as well as a air velocity meter after i defrosted the unit and the air flow is good. Nothing looked like it was be obstructed

  7. #6
    Join Date
    Jan 2010
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    How about how they stock there products ?

  8. #7
    Join Date
    Dec 2014
    Posts
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    Air leakage around that area? Is the drain trapped?

    Sent from my SM-G950U using Tapatalk

  9. #8
    Join Date
    Nov 2016
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    Thread Starter
    they all fall in below the do not fill above this line and i as tested air velocity when the case was full and it all cleared. the case is only about 3 years old.
    the only thing i can think is that middle door is being use too much or i am getting moisture from somewhere. I plan on buying a temperature recorder/ humidity as well as a door counter.

  10. #9
    Join Date
    Nov 2016
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    Thread Starter
    Quote Originally Posted by icy78 View Post
    Air leakage around that area? Is the drain trapped?

    Sent from my SM-G950U using Tapatalk
    Yes the drain is trapped and i will just have to look a lot harder to find an air leakage.

  11. #10
    Join Date
    Jan 2010
    Posts
    17,316
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    So it's a bottom mount evaporator. Did you check drainage path under the coil ?
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