Gaines keystone mailbox door won't stay closed, it pops open after shutting. It seems like the magenets are not strong enough to resist the spring on the door.

The door catch is down or has lost a spring inside the hook
No simple fix but too replace door latch inside
In order to drive car with door that way no back seat passengers till fixed but use tie down ratchet straps from door to door inside handles
This will keep door shut then can drive vehicle normal till door catch is fixed its simple hour job to replace just buy parts have mechanic shop install

We are having the same problem. Seems like latch spring is broken. We can not find any parts for this. Dometic is 3 yrs. old so no warranty. No service for it either. Keystone really took us on this

If the door will not stay closed it is the spring inside door, or the small plastic piece that holds the spring which is attached to the $80.00 piece called outer door.
To fix it, it is EASY and you do not have to even take the inside cover all the way off. Just remove the three sides of cover by gently slipping a plastic putty knife around rim to release the clips. Then attach the spring to the small hole below where the plastic piece used to be, which is located in the metal on the glass frame piece, use tweezers, hold the other end of spring as you place spring onto plastic door latch and set into place!
Snap the inside cover back on and YAY! FINI!

Check the seal in the corners on the side of the door your hinges are on, ya may need to tack it down with crazy glue, but usually it'll curl in the corners preventing door from closing or pop open after you walk away

My new freezer did the same thing. I contacted the company and they went into the whole leveling thing. What it has to do with is the magnetic seal. The magnets are not strong enough to keep the freezer door from popping open when closing the big fridge door. They share the same duct. I level my doors on the fridge and freezer so they swing shut by themselves after opening. Just the force of the big door when it swung closed cracked open the freezer door about a quarter of an inch and if left unnoticed created a puddle and made the fridge run overtime. I solved the problem by placing strong magnets inside the fold of the magnetic seal at the handle end of the door. This is the flap on the outside the door seal. I used six magnets on the top and six on the bottom. The magnets were from discarded Sonicare tooth brush heads. They are very flat and super strong. You can find something on ebay. My freezer door doesn't budge problem solved. I did call the company and told them I solved the problem and they still insisted it was the leveling. Good luck, Art Knapp

These doors have springs to shut them. If you can figure out how to get to the springs usually you will see that one is either unhooked or unattached at one end. If broken on the end bend another hook into it and add a pice of wire long enough to make up the broken difference. 

twtw7771

You said,
The ice maker door seems to have a tight spring or something because when the ice goes in the chute and then backs up.

The door needs to be replaced because it is bent or out of alignment!
How old is the fridge??
Now a days you have a 1 year warranty!

Or the seal is not tight and air gets inside past the door and then the moisture freezes on the spring.

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.

OK LOOSEN THE HINGE THAT SUPPORTS THE FREEZER DOOR.IT'S ON TOP AND HAS 3 SCREWS .JUST LOOSEN AND NOT REMOVE THEM.NOW LIFT UP THE DOOR UNTIL IT LINES UP EVEN WITH THE OTHER DOOR.AT THE SAME TIME TIGHTEN ALL 3 SCREWS. YOUR DONE!!!
PLEASE RATE THIS. THANX!!

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.