Samsung RF32FMQD Freezer & Flex section not Cooling

[Xtian]

This freezer-flex portion of the refrigerator has 1 compressor and 2 evaporators and a step valve.  I've confirmed that the compressor is running, draws .3amps, High side pressure is 250psi, Low side ranges from 3psi to -5psi.  Looking at both evaporators they are not cold at all which leads me to believe that refrigerant is not getting to them or very little if it is. I've verified that there isn't a leak by reclaiming all the refrigerant and pulling and holding a vacuum. I then recharged the system as per the rating plate but same thing, evaps are still not cooling.  So it certainly seems that refrigerant isn't making it to the evaporators.

The step valve motor is getting 13vdc but the resistance on one set of the legs is 82ohms instead of 41ohms, which indicates that the step valve motor needs to be replaced. I'm leading to think that the issue is either a bad step valve motor or a restriction in liquid line before going to the evaporator.  I've researched the step valve but I can't find any documentation on what the different positions are on the step valve.  Is one of the positions on the step valve being fully closed? I've read that it can get stuck in Freezer mode only that will keep Flex evaporator to not cool or stuck in fully open position where both sections work but refrigerant flows all the time to both evaps but I haven't seen if there is a fully closed position that would cause refrigerant from going to either evaporators.  Any one know if there is a fully closed position on this step valve?  Anyone have a manufacturers sheet on the step valve?  Thanks. 

[Vance R]

58 minutes ago, Xtian said:

I've confirmed that the compressor is running, draws .3amps, High side pressure is 250psi, Low side ranges from 3psi to -5psi.

The 250 psi on the high side indicates you have non condensible (air) in the system. This is a lowside leak in the system. Believe in the forced mode FR the compressor and fans run with the 3 way open to both evaps.

For the 3 way valve coils use cn77 pin 5 as common and ohm to pin 6, 7, 8, 9 individually. Those should all read the same resistance. CN77 pin 5 is the 12 vdc feed to the valve.

[Danieltooraww]

On 9/30/2020 at 10:37 AM, Vance R said:

The 250 psi on the high side indicates you have non condensible (air) in the system. This is a lowside leak in the system. Believe in the forced mode FR the compressor and fans run with the 3 way open to both evaps.

For the 3 way valve coils use cn77 pin 5 as common and ohm to pin 6, 7, 8, 9 individually. Those should all read the same resistance. CN77 pin 5 is the 12 vdc feed to the valve.

Same thing happened with mine I actually worked on it at home I have this model RF28K9580SG I ordered part# DA62-04617B Samsung Refrigerator Valve OEM which Samsung claims is a replacement part for DA62-04617D. I replaced it but on the Freon charge it goes to -22” but after couple of minutes Freon goes inside the evaporators and convertible zone gets to 40f and freezer 30 and fridge does get to 40f next day it goes back to -22” and does not cool anymore I’m stuck here if you got any suggestions? 

[Terry Carmen]

There's a low side leak with air and moisture in the system.

Quote

 I replaced it but on the Freon charge it goes to -22” but after couple of minutes Freon goes inside the evaporators and convertible zone gets to 40f and freezer 30 and fridge does get to 40f next day it goes back to -22” and does not cool anymore I’m stuck here if you got any suggestions? 

There's moisture in the system that periodically freezes and blocks the flow then thaws.

It needs the leak repaired and a new compressor and a new driver.

Edited November 21, 2021 by Terry Carmen

[Vance R]

2 hours ago, Terry Carmen said:

new driver.

??? drier 

[Terry Carmen]

2 minutes ago, Vance R said:

??? drier 

Yep. Typo. Too late now.

Can't fix it. 8-(