How to clean crisper drawers humidity control slider?

check drain tube, clean it, enjoy

If you will post the complete model number including the string of digits starting with P, (if it has these) I will look it up and see what I can find.
You can usually go to sears.com, click on parts, enter the model number from the fridge decal, and pull up a parts diagram of the fridge.
Thanks/mike

I'm sorry to say that it sound as though your door gasket may no longer be sealing correctly.

For me, it's simply a task of getting a replacement gasket for that make and model.

To remove the old one you would, simply, peel the inside of the gasket toward the outside of the edge of the door revealing the mounting screws. Remove these screws all the way around and replace with the new one in the same fashion...

The reason that I recommend this is that humid air outside of the refrigerator can seep past a worn gasket and condense on the inside surfaces making its way to the bottom and into those drawers.

Is it flashing vacuum condenser? Ice behind the crisper drawer shouldn't effect the temp. What is it set at? You can go to www.subzerospecialists.com and click on Tech Help for additional info.

Good day,
One user claims that the return air vents or vent located at the bottom rear of the fresh food compartment, have collected enough junk to block the cold air from returning to the freezer compartment. You can clean them out but I cannot verify that solution.

The crispers are located in the coldest part of the fresh food compartment.
This problem can occur when the machine gets light usage especially in colder weather, when the machine running time drops and the air in the fresh food stratifies, causing to cold air to pool in the bottom.

Normal may no longer be normal. Controls by their design will tend to run colder as they age. You might try tweaking the control warmer.
Patience and time are the most important tool you have to work with in dealing with this issue.

The top wide wired basket is just a utility drawer. The next wide drawer near the bottom is the high humidity crisper drawer. I believe the bottom two ones are just utility drawers.

sub zero are vey expensive, and sometimes tough to diagnos, but judging by your description, i would inspect your door seal, make sure it is closing and former a good seal all the way around
the best way to handle this, is to turn it off for the day, and let it defrost for 24 hours,

your drain is clogged, defrost the freezer and locate the drain either on the back or in the bottom of the fridge and clean it out. the water is coming from when the fridge goes into defrost

I have a 15 year old sub zero refrigerator. The drain hole keeps freezing up and ice is building up under the produce drawers. There is also a smell that has accompanied this problem. We have melted the ice and forced warm water through the tube to clean out any blockage but it keeps freezing up. Can you help?????

The tube behind the crisper drawers is not insulated well enough and will repeatedly freeze, leaving the water to drain on your floor. The solution is to thaw the tube and put a piece of copper the length of your tube, into the area below. The wire extending into the area below is just warm enough to keep the tube from freezing.