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Author Topic: Sealed System  (Read 8729 times)

Offline mhelgesen11

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  • Member Since: Jul 2019
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Sealed System
« on: October 11, 2019, 08:39:12 PM »

Where can I find some good videos on how to go through the procedure on a repairing a sealed system. I have checked YouTube but looking for a video that says when pressure gets to .. then do this and also how to evacuate the system. Also is adding sealed system to the repair arsenal worth it? Thank you

Offline tcarmen

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Re: Sealed System
« Reply #1 on: October 11, 2019, 09:31:47 PM »
> Also is adding sealed system to the repair arsenal worth it? Thank you

Unless you're going to make it your specialty, or do really expensive machines, I'd have to say "no".

The new machines are more delicate and fussy than the old ones. The days of buying a Tecumseh compressor that's "about the right size" for not much money and installing it in an hour or so, and making a good profit and having a solid repair that will last decades are pretty much gone.

Also you watched a bad video. The only way to reliably charge a new domestic refrigerator is with a high precision digital scale, not by watching the pressure.
« Last Edit: October 11, 2019, 09:36:39 PM by tcarmen »

Offline mhelgesen11

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Re: Sealed System
« Reply #2 on: October 11, 2019, 09:53:16 PM »
so if you run across a refrigerator that needs the sealed system repaired do you just contact a local mechanical HVAC company if the customer still wants it repaired? And also would you still charge that customer your service fee for coming out?

Offline tcarmen

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Re: Sealed System
« Reply #3 on: October 11, 2019, 10:08:04 PM »
Once I tell the customer how much the repair is going to cost, it's generally around 1/2 the price of a new machine, so they just replace it.

When I run into something really expensive like a sub-zero, I refer it to a guy who does a lot of them.

25 years ago, I did a ton of sealed system work. Now, hardly ever.

Also, the refrigerant and tools are changing. If you get setup to do R134, etc. now, you're going to own a lot of obsolete equipment when the hydrocarbon machines get more popular. They require completely different tools and techniques.


Offline Tcmkek90

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Re: Sealed System
« Reply #4 on: March 04, 2020, 06:44:29 PM »
Sealed systems on refrigerators are going to R600 isobutane so that means new equipment. Lokring fittings replace brazing joints. This outfit is very pricey around $2000.00 I

Offline vunger1

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  • Member Since: Sep 2015
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Re: Sealed System
« Reply #5 on: January 13, 2022, 10:28:59 AM »
learning sealed systems has rewards beyond domestic refrigerators.
Although understanding sealed systems will help in diagnosing of domestic appliances.
But a good understanding will help in diagnosing Hvac systems , walk in coolers, ice machines, and even automotive.

 !!!!! DO NOT!!!! enter in all at once. Get some tools and buy some refrigerators on the side and fix them and sell them. Kind of a pay for your play time. Slowly learn the brazing techniques (in tight areas) , how to protect surround wiring and plastic components, and the ever critical Super-heat and sub-cool.  Learn this stuff to help in diagnosis, even on domestic units. Sealed System can be profitable if you are thorough about ruling out leaks and if you have a good understanding on how they work.
 After about 3-5 years you can work into a place where you can do hotel ice machines, florist coolers, soda machines, it just can really open up more oppurtunities.
 

Offline Pnwdad1981

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Re: Sealed System
« Reply #6 on: February 09, 2022, 11:33:13 PM »
Just work on the LG refrigerators youíll be a master in one month of any Sealed systems thatís all that ever goes wrong with those POS units. Compressors evaporator leaks more compressors restrictions and then start over again
🌲PNW Chris🌲