The refridgerator is AF28VX1DTA. It starts making a noise that seems to be coming from the freezer. It almost sounds like a fan hitting something. Then the fridg looses it's cool...then sometimes the freezer stops being cold. We unplug and a few housrs later, it usually resumes normal operation for about one day, then the same thing happens. This has occurred 5 or 6 times.

SOURCE: Fridge and Freezer working intermittently; not getting cold and making a vibrating sound

Dave, what you are hearing is the overload kicking out on the compressor. It's one of two things, either the compressor is failing or PTC (overload, relay) is going bad. I haven't seen too many PTC's fail on Frigidaire, but I have seen a lot of compressors failing. Your refrigerator will have a 5 year warranty, parts and labor if the compressor is at fault. You would have to do some tests on the compressor to determine which one is at fault. If you have a clamp on ammeter you can see how many amps the compressor is drawing during start and run. The compressor should have a label on it with the amperage information. You could just replace the PTC, part number 218721119 and see if the problem goes away but you could be throwing away money here if the compressor is the problem. With out being there, my guess would be the compressor itself. Catriver...post back.

SOURCE: Haier Refridgerator

Your freezr drain is blocked or frozen. What you need to do is remove the ice rack then in the front of the freezer you will see 2 or 3 plastic plugs on the freezer floor remove the plugs and there might aso be some 1/4 inch screws farther in on the freezer floor. also remove the back of the back of the freezr and then lift out the bottom floor. under the evaporator you will see a lot of ice or just fod blocing the drain. I will bet its all full of ice. Carefully remove all the ice and hot water will help once you get the buk of it out. The hot water will make sure the drain is not blocked with ice. Once its al clear install in the reverse order and things should be good. This is a common problem with this unit.Good Luck

SOURCE: kenmore refridgerator c1065094881

It sounds like your defrost cycle has stopped working. unplug your fridge for 24 hours and let it defrost. plug it back after 24 hour and if it starts to cool in the fridge part at about 40 degrees F. you will have to replace one of three parts the Defrost Timer, Defrost Themo or Defrost Element. I hope this helps you.

SOURCE: Loud buzzing noise from inside Jenn Air 2389G fridge

i don't know jennair specifically being from england.
however, there is often a fan inside the back panel and the noise you heard was the fan hitting ice. the reason now not heard and fridge not working may be that the ice has built up so much the fan is jammed

SOURCE: Samsung SR S2028CSS Fridge Freezer - Fridge temperature problems

Try setting it to lower temperature. If that don't work the thermostat is bad.