Hi,
a) If the refrigerator bulb doesn't work then its electrical issue.
Check for the tripped circuit breaker and the fuse may be blown if it is electrical issue
Check proper volts flows in and out.
1)Check the refrigerator is properly plugged.
2)Check for a blown fuse in the circuit breaker.The fuse in circuit breaker supply the proper voltage to the refrigerator.Check if it is blown or not.
3)Check you get proper outlet voltage and test it you get the required voltage is being
supplied.
b) If the bulb works and the refrigerator is not working these could be the reason.
1)Test the compressor motor for continuity using a multitester.
2)Test the fan for continuity using a multitester.
3)Test the main control board for continuity using a multitester.
First Check the back wall or floor of the freezer section for frost.The Freezer(evaporator) fan is running?.This fan problem is very hard to detect.
The DC motor for the fan wears out the RPM's are effected.It gives the illusion that it is running fine,but it doesn't have enough force to supply air circulation for both the freezer
and the refrigerator See weather the condenser coil for
blockage from dust and the condenser fan is running.
1)Check the temperature setting.
Set it to max and min and check for any changes you can see in the system.
2)The compressor vents cold air into the freezer. Occasionally the vent can become clogged with ice, food or other debris. Locate the vent and clear it. To remove ice, use a hair dryer set to "low". Using the high setting may cause damage to the components or interior of the refrigerator.
3)Test the temperature control
With the ohm meter you can test it.If it does not show any reading this is the defective one you have to replace this soon.
4)First Check the back wall or floor of the freezer section for frost.The Freezer(evaporator) fan is running?.This fan problem is very hard to detect.
The DC motor for the fan wears out the RPM's are effected.It gives the illusion that it is running fine,but it doesn't have enough force to supply air circulation for both the freezer.
5)Check for a clogged drain tube if it is clogged remove the clog.
6)Test the evaporator fan.The evaporator fan circulates air over the refrigeration coils. The coils absorb heat and the chilled air is then circulated. If the fan does not operate, the freezer will not cool properly. The fan motor may have failed, but check first that something is not simply blocking the fan blade.
7)Defrost timer is set on the temperature control board.So test the board and check it is defective.
8)Heater and defrost thermostat is located behind the back wall of the freezer section.This only controls the Heat.After the Defrost timer stops it makes the system warm.Defrost thermostat could be defective.
Note:Switch off your system for 8 hours more so the frost will melt and the refrigerator will start working in some cases if it blocked with frost.
post a comment for further assistance.
Thank you for using fixya have a nice day:-)
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