The compressor does not start, the light inside is on.
The control card may be faulty. Sometimes a fee can be "reflashed", but in some cases it may be necessary to replace it.
The refrigerator does not turn off.
Possible damage to the thermostat. It is necessary to replace the thermostat.
The unit does not freeze, frost is visible in the freezer.
Probably a leak of freon. It is necessary to find the place of leakage, replace the damaged nodes and fill the system with freon.
The freezer compartment compressor turns on and off.
The freezer compressor may be faulty. Diagnosis is required, then repair or replacement is possible.
The refrigerator has accumulated water
If moisture collects in the bottom of the unit, it is probably necessary to replace the rubber seal on the door.
The refrigerator freezes too much and does not turn off.
Most likely a temperature sensor has failed. It is necessary to replace the faulty temperature sensor.
In the single-compressor unit, the freezer does not turn off.
If the main compartment of the refrigerator is warm - most likely a breakdown in the switching valve. It is necessary to replace the faulty valve.
Compressor does not turn on
Probably in the refrigerator the starting relay failed.
Also, the cause of the breakdown of the motor-compressor may be a leaky refrigerator door or improper installation. Make sure that the outlet is grounded.