The freeszer door on my Sub Zero does't have suction anymore

Possibly iced up & needs defrosting

1. Check entire condition of seal, even the bottom section and make sure it is not damaged.
2.Check the seal on the side of the door the hinges are on, they may be catching on the cabinet when closing, if so, use petrolium gel and rub it on the face of the seal, this will allow lubrication of the seal.
3.Also check that the seal has not swelled , if so, you can rectify this by using a hair dryer and starting on the sides the hinges are on, carefully heat the outside of the entire seal on that side, then close the door and hold firmly closed till cool, then move to the other side, top, then bottom doing the same process each time, this usually works a treat.

I hope that has been of some help for you and it works.

Please dont forget to vote, thankyou. regards Russ

I believe the suction sound you hear when closing the frig/freezer door is the warm air that was introduced into the unit actually shrinking as it rapidly cools. This creates the vacuum which makes the door next to impossible to open until the air pressure stabilizes.

I suspect a bad fan motor, door switch, or not defrosting.The suction when door closes is caused by the low temperature created when working properly.

You probably have some food on the way. Unload the freezer and see if the door would close better. Looks like you have a warm air leak.
Sub-zero refrigerator repair in orange county, ca
appliance repair orange county, ca

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,

Right hand side wall in the freezer - take a look- any frozen water or moisture? Need check a drain line, usually defrost heater inside the freezer wall getting bad and draining water just freezing inside of it.

Check guides for icing, is it door seal is good? Any frozen moisture on freezer walls and other parts? If door seal bad - replace it.

If Your Refrigerator's Freezer Door Pops Open When You Close the Fresh Food Door... If a 'top-freezer' refrigerator's freezer door pops open when the larger fresh food door's closed, it's actually a good thing. That tells us the seals are in great shape, sealing well.
Some freezer door 'pop' is unavoidable bc the bottom door's so much larger than the top one and the hydraulic effect of compressing all that air kicks in. The two compartments share the same air via a duct between them, and that compressed air rushes up into the freezer compartment and can 'pop' the door.
To improve the situation, apply a few drops of oil (sewing machine oil or 'three in one' - NOT WD-40) to each freezer door hinge pin. (Even better: if you can, pull the doors and coat the hinge pins with petroleum jelly). This will help the freezer door swing back closed by itself. The freezer door usually stays ajar because it's binding a bit, and that's usually caused by it's swinging 'dry', with no lubrication.
It’s also a good idea to ‘kick’ the habit of letting the refrig door close hard.

Just a guess, but I would check the gasket on the door. They can go bad or get distorted and bunch up and cause the door to bind and not close properly. Also check that the fridge is leveled properly. Will the door close if pushed? Will it stay closed?