Initial problem was unit was running all the time and not getting cold enough. THINK problem was clogged defrost drain. Unit cools good now but temp in fridge varies. Example...turned down temp setting to 2 last night but thermostat reads 32F this AM. Assume temp control thermostst. Could it be low on freon charge or cendenser issue causing too much cooling? Thanks

Has a plastic trap just to the outside of the freezer and alot of black junk came out when I cleaned. Unit began to cool good after this. Condenser and fan motor running. Just surprised to go from too warm to to cold with only chnage being cleaning of drain.