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Re: No COOL Air
May I ask how you know that the freon level is good. If while it is running, there is not ice cold air coming from it, this would definitely indicate a problem with low pressure freon which would most likely indicate a leak. Only trained professionals are able to check it so unless this has been done, please don't assume that there is plenty of freon if you are doing such a thing. please let me know how you checked it and if it really is fine, then a sensor is bad.
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Most of the time it runs only when the compressor is running. In other words compressor and fans will run together when the fridge thermostat ask for cold and stops together when thermostat is satisfied. In newer fridges some time inside fan (evaporator fan) might PERIODICALLY run without compressor to circulate little cool air to fridge compartment from freezer compartment.
general design requires compressor on off ratio to be total run time to be 18 hrs on per 24 hr day off time allows compressor to cool down averaged over the day cool air is required around the outer walls of the fridge to cool the condenser coil at the rear also
It sounds like your unit may have a bad run capacitor or start capacitor and relay. Low voltage will also cause this problem. First you need to make sure that you have the full rated voltages at the unit, if you do, then, have the run and start capacitors checked out and the start relay.
please check the temperature sensor this will make the compressor for running and stopping and also check the compressor if its in warranty period please call the service technician to check these and replace if necessary.
The compressor is probably not runnng.
The Main reasons that this will happen
1 - A bad run capacitor (silver or metal capacitor)
It’s either shorted, grounded or open.
If it’s shorted a lot of times it will bulge out, (sometimes slightly)
2 - A bad start kit ( plastic capacitor and Relay connected to it )
The capacitor is either shorted or open
The relay either has an open coil between terminals #1 and #5
Or the relay is stuck.
Any time you change the capacitor or relay you should change
the other, especially if they are over a year old.
3 - A loose, burnt or disconnected wire
4 - Wired wrong
5 Compressor is open (windings burnt open)
6 Low on charge not getting enough cooling back to compressor, (Feel top of compressor to see if it’s hot it shouldn‘t be)
7 Some compressors have a black plastic overload under the compressor cap which could be bad.
Have someone check the run capacitor of this unit. If the run capacitor is bad over shorted it can cause the unit to run and short cycle on a current overdraw. This makes for an electrical imbalance in the compressor motor. Next step is the compressor is faulty.
If the compressor starts and runs for a few seconds it could be the relay. Or it could be the compressor itself has failed. When a compressor starts and runs for a short period it is possible that the relay contacts are arced together which would have both the start and run winding in the motor engaged at the same time for more than 3 seconds. This would result in the compressor tripping out on the thermal overload. It depends on what type of relay your compressor has. If it is a thermal relay, unplugging the refrigerator for about 15 minutes would allow the relay to cool off and reset.