There is water building up in the bottom of the fridge ( under the crisper drawers). If I leave it there it will freeze. What is causing the water? The fridge is 18 years old.

My GE Fridge did the same and the repair man I called said there is a little drain hose that goes from the top to the bottom of the Fridge at the rear see if that hose is plugged. I unfastened it at the top and blew air through it and the water is no longer a problem.

Good Afternoon Friend,

I understand that you are receiving water at the bottom of your Frigidaire refrigerator, model# FPUI2188LF. What can cause this is either humidity coming from outside your refrigerator or maybe from the crisper drawers. Make sure your crisper drawers are set for a high humidity. Another thing that can cause moisture build-up at the bottom of your appliance is not covering your foods. Make sure that all foods and drinks are covered to cut down on moisture floating around inside your appliance. Hope this is helpful.

-Best Regards-
WP

You need to get a replacement gasket for the make and model of the refrigerator, http://www.fixya.com/support/12355008-water_in_bottom_left_crisper_drawer

The coldest place in your fridge is in the crisper drawers, manufactures know this and they even put heaters under the floor of your fridge to try to heat it up a bit in there, if you set your freezer temperture to low there will be less cold air current that flows into your fridge but it will flow in over a longer period of time, that air is about -22C so it will be blowing on your items in your crisper for a long time and it will probably freeze them, all very confusing and complicated but it may help to turn your controles for your freezer to a warmer setting, on the other hand if you only open your fridge a few times a day the cold air being denser will settle in the bottom of the fridge and freeze the crisper area, not much you can do about this, except eat more food... :-)

You have a leaking water tank behind the crisper drawer. You will need to get back there to determine if the tank is leaking or the water connection is leaking. This will only leak if you close the door and dispense water from the dispenser.

A common problem. All modern refrigerators have an automatic deicer. The heater kicks in, then MELTS the ice in build up in the freezer for a short period before freezing again. This water drains either in the fridge or out the back to the catch tray. Simply pull out the bottom drawers and clean the clogged drain hold where the water can drain and evaporate in the catch tray as it is designed to.

clogged drain line somewhere in fridge plumbing

What happens is the drain will get stopped up and the defrost water will cascade down the back wall and puddle up under the drawers. You must access the evaporator area and open that drain.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Has the refrigerator got a wet inner back?
Ff this is wet, adjust it until this solid ice 'blobs', bt not encrusted, like in a freezer
The refrigerator may not be cool enough and the natural warm moisture allowed into the cool compartment when the door is open is condensing into fluid before it is cooling sufficiently to suspend the moisture as a vapour. If the cool compartment is cool enough, any warm air admitted ill be chilled before it is allowed to condense, keeping the refridgerator dry.
However, the only drawback is that you will have to monitor it to prevent the build up of excesive ice.
Also, whether the refridgerator is either empty of full willaffe the day to day operation.
Hope this helps.

you are right about the cause of water in the fridge - blockage in the drain. i'v never met this caused by ice but it is possible.
with the freezer, the cause of the fault is the fan not working - probably jammed with ice. take back panel off inside freezer and check for ice build up. if loads of ice thgen defrost system has failed. you can do a temporary repair by melting the ice off with a hairdryer