Refridgerator not cooling screen says service EC

There are several things that can cause cooling problem with your refridgerator. The first and most common is dirt dust and lint clogging the condenser coils. These coils are usually located underneath the refridgerator and have a small fan that blows air across them. If they are clogged, the refridgerator cannot get rid of the heat to allow it to cool properly. To check and clean these coils you must first pull out the refridgerator and unplug it. Remove the lower panel ( usually made of a cardboard material) this will give you access to the compressor and fan and coils. Check the coils for dust,dirt and lint. Clean out carefully with a vacuum cleaner or brush( you can get a brush specially made for this ) check the fan motor to see if it spins freely( some units may not have a fan) plug unit in to see if fan runs (make sure to temporarily turn thermostat down colder to turn on compressor and fan). If fan does not come on with compressor you may need to replace it. Put unit back in place and see if that solves the problem. If this does not help, you will probably have to have a appliance repairman check out unit.Hope this helps.

Is the fan motor running below and the coils clean? If nothing is running but the light is on you might have a stuck defrost timer

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First check your filters to make sure they are clean and you have proper airflow.

If they are clean, then you either have low refridgerant or dirty coils.

The outside coils can easily be cleaned by disconnecting power to the unit, then using a water hose to spray off the dirt, grass, etc.

The inside coild can be very difficult to get to on some units and require a special evaporator coil cleaner. As for adding refridgerant, the Law requires one to be certified for purchasing or working with refridgerant so you may need to call a service tech for that. Expect a bill from $100 to $225 for a typical system recharge depending on how low it is and which company you call.

First check and clean the filters, and the evaporator coil. (thats the "inside" coil that has the indoor air sucked through it, cooling it and then pushing it out the vents.

If the filter is clogged or the coils are dirty, it will not cool properly and potentially freeze up.

Also check the condensor (outdoor) coil, if it is dirty/clogged, it will run hot and not cool properly.

If all coils and filters are clean, and the fan motors are running and in good condition and it is still not cooling then you are likely low on refridgerant. (handling/purchasing refridgerant other than R134A requres a CFC certification by law)

No that would be either a dirty filter/coil ir low refridgerant if it's freezing in cooling mode.

Clean/replace the filter, clean the coil and if it keeps doing it, have a technician who is EPA certified for servicing systems with refridgerant to look at it/add refridgerant.

Low refridgerant or dirty coils/filter.

Thats pretty much the only thing that will cause an AC to not cool if all the other mechanical components are working.

Check/change the filter.
Clean the coils/ have them cleaned.
And have the refridgerant levels checked.

my water dispencer has a low flow after an initial regular flow. why?

Rhino, this is yet another simple fix. You need to call subzero and let them know that your ref section is not cooling properly. 9 out of 10 times it will be a problem with the evaporator coil needing replacement. Sub is aware of this issue and usually picks up the tab for this repair.

If you replace the fan and clean the coils, and the refrigerator STILL does not cool, then contact SubZero or a service provider for an evaporator coil replacement.  Units manufacturer before mid-2003 had copper+aluminum coils that would corrode and allow all of the coolant to escape.  The (should be warranty) replacement is all aluminum.
Note the freezer does not have this issue due to the lack of liquid water.