Model DDSB483DSS 48-inch side by side. Why does the freezer door pop open when refrigerator door is opened or closed?

I have a refrigerator with a top freezer that was constantly popping open, just enough to let the heat in and melt anything inside. This can also cause heavy frost build up from condensing humidity in the air. The frost can build up on the front face of the fridge where it meets the magnetic gasket on the door making it even harder to keep the freezer closed.
The cause in my case was that slamming the refrigerator door sent a puff of air through the ductwork to the freezer above. The sudden pressure increase popped the freezer door open and the door wasn't heavy enough to close on its own. Since this is a beer fridge in my garage I fixed it by putting a stick on childproof latch from H-D on the freezer door. :-)
If this was our main fridge indoors, I would first check to see how much force it takes to open the freezer vs. the refrigerator section. It should be about the same. If not, check the freezer door gasket to be sure no food or ice is built up on it and that the mating surface is clean. Check that the door is closing parallel to the mating surface. A misalignment would make it hard for the gasket to seal or stay sealed. Adjust hinges if necessary. If all seems ok, check to see if the fridge is level or possibly needs to be adjusted so it tilts back just a bit to make the doors self closing and not fighting gravity to stay closed. If all else fails, inspect the door gasket to be sure it isn't broken or stiffened with age. Inspect the bottom of the door gasket with a mirror. I once had a side by side with what looked like a good gasket until I felt around the bottom of the door. Replace if necessary.

Seals don't lose their magnetism. Check the door closes all the way round and adjust the hinges if it doesn't sit straight. Check there isn't a relief valve frozen up or blocked (it allows air to escape when the doors are closed). Check the drawers are fully pushed back in and not stopping the door closing properly

that is common, your pushing air back into the other side and that pops the door. First adjust the ref so that the back sits lower than the front. It will have 2 5/16th nuts on the front behind the kickplate. going left will lower the back of the unit. After that get out some vasoline and lube up the flat sides of the door seal, this will help keep the seal moist and it wont pop open as easy

That is a common occurrance for side by side refrigerators. Closing the fresh food door is like having your car windows closed and closing the door. You can feel the air pressure on your ears. In the refrigerator, the air passes through the duct and into the freezer pushing the door open. The magnet on the door gasket should keep it closed. But it may be the freezer door needs the hinges adjusted to the door seats better when closed. Take the plastic cover off the top hinge and you can loosen the screws (don't take them out) and adjust the door slightly (so it looks even between both doors) and tighten the screws up. The top of the door should be level with the top of the unit, and the gap between the doors even the whole way down.

The lower hinge on each door may have a door closing cam. It raises the door up ¼ inch when opening and this assist in closing the door. If it’s wore out and doesn’t work the door may not seal and the gasket can be damaged. Watch the operation of the door to see if it rises up when opened.

Leave the door shut and let the magnetic gasket hold the door in place. Put something between the bottom of the door and the floor to hold it in case it slips.
Remove the bracket holding the pin and hinge assembly taking note of order of removal of parts. Slide new cams on. You probably need two.

The lower hinge on each door may have a door closing cam. It raises the door up ¼ inch when opening and this assist in closing the door. If it’s wore out and doesn’t work the door may not seal and the gasket can be damaged. Watch the operation of the door to see if it rises up when opened.

Leave the door shut and let the magnetic gasket hold the door in place. Put something between the bottom of the door and the floor to hold it in case it slips.
Remove the bracket holding the pin and hinge assembly taking note of order of removal of parts. Slide new cams on. You probably need two.

This is a problem inherent with lots of refrigerators. Side by side or top freezer. The rush of air pops the doors. You might want to adjust the pitch of the box by adjusting the front wheels to a higher level.

no promblem when you shut one door it forces air to the other side remove the kick plate at the bottom adjust the rollers till the fridge leans back i set them so when you turn loose of the door slightly past the halfway position it shuts its self that way when it pops open it shuts its self

Adjust the feet to raise the front of the frige, which should be higher than the back. Therefore the weight of the door will keep it shut or at least cause it to shut itself if it pops open.

Look at the bottom of the freezer door, there is a little plastic stopper there. It may be worn out or broken. When you close the door this is what holds it there. Start there first.

Sgt 48