Maytag mbb2256gew Is 50oz. r134-a the correct charge?

The amount of coolant is included on the compressor label.
Once reading the label, perform a vacuum test for 15 minutes and if it holds with no leaks, refil to the correct weight of coolant and seal.

You can not add to an empty system, with just air inside it

The system must be checked for leaks & repaired first

If that was done, then you need to pull a vacuum on the system
& see if it holds,I assume you know that,if not, you need a repair
shop with the correct A/C Equipment

The amount of refrigerant is on a sticker under the hood,also in factory service manuals & repair shops have it in similar data base
info.

Your referring to a complete charge of the system,not adding to it

That has to be done under a vacuum & you need some knowledge of the laws of physics pertaining to refrigerant

Helps to have the factory charts also, to look at ambient temp at the
time of charging & system pressures

Have a shop work on it

To properly charge that freezer the system needs to be put into a vacuum to below at least 500 microns. Did you fix the leak? The only reason to put refrigerant into a system is if it leaked out. Also it has a critical charge and must be weighed in with a scale in onces. If it says 16 oz. It will not work right if you put in 15 or 17 oz. If you did all these things the only thing left is to replace the cap tube drier assembly or the temperature control. Hope this helps and good luck.

Have the system pressures tested with a set of AC pressure gauges at a local shop to determine whether the system is low on refrigerant. If the system is found to be low the leak must be repaired, the system evaluated with a special vacuum pump and then refilled with the correct amount of R134 refrigerant.

On the compressor it should display that information , along with the LRA, size of compressor and what type of freon

There is a specification plate on the base of the unit. It will have the refrigerant type and quantity listed. The leak should be found and repaired before re-charging with refrigerant.
1993 model could be r-12,r-22 or r-134a.

The coils are supposed to be hot as they remove heat from the fridge which causes the fridge to get cold. The water under the fridge is from the defrost cycle that quickly melts frost in the freezer and sends it through a tube to a collection pan underneath. If there is water on the floor, the hose is misaligned or plugged up.

Yes you have a bad relay on your compressor.Remove the rear panel and take off the relay on the compressor shake it.If it sounds fried then you need to order new on .Just give your model# to your local parts depot and ask them to order you a new compressor relay hope i fixya:)

Possible leak in the sealed system. Make sure the technician pressurizes the system with nitrogen, changes drier, evacuates to 500 microns, then weighs in the correct charge.

The car should have R134 freon (and should have a label in the engine compartment indicating so). R134 ports are two different sizes and your charge hose should only fit the correct port