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Author Topic: Subzero 550 Evaporator Leak  (Read 119 times)

Offline tgoods

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Subzero 550 Evaporator Leak
« on: February 22, 2013, 10:24:14 AM »
I've got a 17 year old 550 with an evaporator leak. I have a 10" vacuum on the low side. It has 134a refrigerant.  Subzero recommends replacing the compressor when there is a low side leak on 134a fridge. Frigidaire doesn't recommend replacing the compressor when there's a low side leak but recommends replacing the filter/drier with their 2-stage drier, 5303918288.  Frigidaire is pretty proud of their drier at $80 wholesale but Supco has the same drier, SUD8288, for $16.  Has anyone here had any experience with these 2-stage driers? Is it a good substitute for replacing the compressor?

Online niobrara

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Subzero 550 Evaporator Leak
« Reply #1 on: February 22, 2013, 12:39:52 PM »
I went with evap and compressor on the last one but I can't remember what dryer I used but it didn't cost $80 and I still don't get replacing the compressor but that's what subzero told the customer it needed and that's what they told me they wanted

Offline domain

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Re: Subzero 550 Evaporator Leak
« Reply #2 on: February 22, 2013, 01:42:36 PM »
Low side leak allows atmospheric pressure in the system, saturating all of the compressors oil and internals with moisture :D

Online niobrara

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Re: Subzero 550 Evaporator Leak
« Reply #3 on: February 22, 2013, 08:27:24 PM »
So why wont vacuuming  the unit and replacing the dryer work.  It does on other units?I understand the theory.134 blows bring back 12.Ah, for the old days. I have replaced a couple with just the evap and dryer,still cooling.  8)

Offline domain

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Re: Subzero 550 Evaporator Leak
« Reply #4 on: February 22, 2013, 09:54:05 PM »
Every brand has THEIR OWN specific regulations and guidelines, but that is the theory. O0 :D

Offline tgoods

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Re: Subzero 550 Evaporator Leak
« Reply #5 on: February 23, 2013, 12:07:30 AM »
I only checked the low side.  When I go back, I'll tap the high side and check the pressure.  If there's air in the system, I should see higher than normal high side pressure.  If it has lower than normal pressure like the low side, there's probably very little or no air in the system. Then, I'll decide if I should replace the compressor or not.  I can get a generic equivalent compressor for half the cost of the Subzero compressor.

 

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