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Old 11-19-2020, 10:50 AM
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One of the commercial properties I take care of has frozen spots all up and down the copper lines just above the ceiling grids, causing drips, molded ceiling tiles etc.

What causes this and what is the fix? The insulation around the copper lines is in pretty good shape and apparently it is freezing up at most of the joints in the insulation.
Old 11-19-2020, 11:11 AM
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What's the pressure in the lines doing?
Old 11-19-2020, 11:14 AM
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Originally Posted by Garett View Post
What's the pressure in the lines doing?
you mean saturation temp, right?
Old 11-19-2020, 11:17 AM
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Call a tech out to check the system and the pipe insulation. Pressures alone won’t tell you much.
Old 11-19-2020, 11:29 AM
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I sent a few pics to the guy that owns the company I've used for a number of years. He said put buckets under it and turn the unit off, that didn't sit too well with me. I was expecting him to say, its likely this or that, so I could give the owner and tenant a heads up as to what we might need to do to repair it.
We being, the A/C company and possibly me to open up turn off the alarm etc if it needs to be done after hours

One of his crews did some work on this property a few months ago, so they're familiar with the unit. They did not check freon or anything at that time.

Last edited by willie g; 11-19-2020 at 11:45 AM.
Old 11-19-2020, 11:38 AM
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Every time I have seen this happen it was low refridgerant.
Old 11-19-2020, 01:21 PM
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Originally Posted by Lorne Greene View Post
Every time I have seen this happen it was low refrigerant.
Pretty much the main reason for any part of the system freezing up.
Old 11-19-2020, 01:40 PM
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Low airflow, low load. Dry, intact aflex should not drip under normal conditions.
Old 11-19-2020, 01:46 PM
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Originally Posted by Lorne Greene View Post
Every time I have seen this happen it was low refridgerant.
Originally Posted by mikefloyd View Post
Pretty much the main reason for any part of the system freezing up.
this along with dirty air filters!
Old 11-19-2020, 01:48 PM
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Originally Posted by saltyreefer View Post
you mean saturation temp, right?
i think garret was meaning low pressure as in low on refrigerant!
Old 11-19-2020, 07:51 PM
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Originally Posted by Rolandt03 View Post
this along with dirty air filters!
Dirty coils and a fan motor not running will cause a freeze too.
Old 11-19-2020, 07:59 PM
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Originally Posted by Rolandt03 View Post
this along with dirty air filters!
And/or an evap plugged with poo that snuck past the filter
Old 11-20-2020, 05:18 AM
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The coil is iced up and now refrigerant is flooding back to the compressor. Ice on the suction line is a no go!

Could be any of the things mentioned above.

It needs to be serviced before you scramble a compressor. It is not gonna fix itself!

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