This was a service call on a walk in freezer not cooling, the call came in during a 120 degree heat wave we had in early July. I found that the scroll compressor had dis-engaged and was internally bypassing when I arrived, I cleaned up the condenser and got the compressor cooled off and it started back up.

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20 thoughts on “Walk in Freezer not cooling

  1. Squirtle Hvac says:

    I agree with you on the scrolls for low temp. Our company avoids installing those type of units. I remember some super markets would have to leave water hoses hitting the condenser on hot days because they would get head pressure issues too.

  2. Australian Fridgie says:

    Hi Mate. Great vid. Once you’ve confirmed condenser size is correct and condenser u bends are all connected correctly. Its possible it might have air in system. Change driers and triple evac breaking with dry nitrogen and try to get a 100 micron vacuum. Use a 4 port gauge manifold so you don’t have to “open” anything up to atmosphere. Interested to see how it ends up. Cheers!

  3. Frymiester says:

    In low temp I always preferred semi-hermetic so long as it was an internal refrigerant cooled motor. I was never a fan of recip compressors in low temp, I would choose a scroll over a recip.

  4. Alex Zapata says:

    This is my favorite hvac subscriber, the man literally does it all commercial refrigeration. I love the service call walk through and the ending recap 5 star material, not everybody does that. YouTube needs to do video awards red carpet invite this man on board cause this is the stuff of legends.

  5. Moon Moon says:

    I’m not into HVAC as a job but I am curious as the topic still interests me. What do you think about scroll compressors compared to reciprocating piston ones? Are they any more reliable, more efficient, quieter?

    And, I’ve watched a good number of these videos now and I’ve never seen anything that looks like an inverter drive for these compressors. Am I just not seeing them, or is it just smaller light duty compressors that run inverter hardware?

  6. slamdvw says:

    Could even get fancy ( if you haven't already ) and set that swamp cooler up on a high side switch. Head gets to a set point and turns the cooler on.

  7. D Willans says:

    Agreed mate, here in Australia we use recips on low pressure apps, bitzer semi's particularly running 404.
    Scrolls for medium temp or a/c.
    Regular days of 85% RH, 105 deg c is normal.
    Good info great channel, well done.

  8. Michael Kenney says:

    It's always been my understanding that scroll comps. we're and are intended for dealing with much bigger loads of refrigerant. both in terms of the quantity (lbs) and the actual temp difference. almost feel like that particular application is like putting a v8 in a civic. Don't think it is the coil that is undersized but more so the compressor.

  9. Nina McClure says:

    I'm willing to bet that since most people go on the cheap to save money, you have undersized condensers. I'm not a pro though so dont listen to me. Thx for the great videos.

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