Freezer door pops open.

That is a common problem with over-under units. You can clean or replace the door seal or, tilt the unit back a TINY bit. The door pops open because there is a common airway from the freezer to the fridge. When the fridge door shuts too fast, it pushes a lot of air into the unit. It needs to go somewhere so, it pops the freezer door open. If you shut the freezer hard enough, you will be able to pop the fridge door open.

The fridge and freezer share their airspace, so when you close one there is a slight increase in pressure in the other unit. (Much like opening a window can cause a door open/close in your house due to pressure change/air movement) The magnet in your seal of the door is weak and unable to resist the pressure change. The seal should be changed.

Could also be that the door is not shutting properly in the first place due to sagging or skewed hinges that need adjustment/replacement and while shutting just may not be getting a complete seal that it should be.

there's nothing wrong w/your dr seal. add a then layer of silcone or vaseline to the seal. this will make it sticky again.

well u need to check the rubber of ur freezer ;s door .some damaging in the rubber is causing the problem.

Your pushing air from the fridge part over to the freezer door when you clos it,the only thing i can suggest is make sure that the seal (which is magnetic) is clean and not falling apart,inspect it all around the door,and when closing the door i would close it gently.

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Len West

This indicates that you do not have good airflow and return airflow between your freezer and refrigerator sections. That is why the pressure from closing one door is causing the other one to pop open.

Check the drain tube on the back of the machine to make sure it is not clogged or blocked with frozen water inside. Also check any return air flow vents inside the unit for clear ice.

its air pressure between the wo doors that cause it to open the freezer door.take some soapy water and clean the sels aroundboth doors to see itf thet dosent help use dish soap and a little water to clean the seals with it should stop 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.

I have the exact same problem - very annoying. The only thing I found to work was to purchase one of those child safety locks. I bought the Kidco Appliance Fridge Lock S330 because it was the only one I could find that automatically relocks after you shut the door. Buy two (or more) at a time because the arm will eventually wear out and break (after several months depending on how often you use it). You can check out the product's details on eBay - that's where I purchased mine. Hope that helps.

Could be the air pressure created from shutting the refer door is popping open the other one. There are are channels between the two so cool air from the freezer gets to the refer compartment. Try this as a test... s l o w l y close the refer door and see if that keeps the other door from popping open. If that works then it's likely an air channel is frozen up somewhere and you may need to turn the unit off for a day or so to let it thaw out. Moisture from leaking door seals, or doors that were left slightly open overnight can be sucked in and freeze up the air channels. I don't know if you are sort of slamming the door shut or not but the doors need to be shut slowly due to how air tight the new refers are.