1. Make sure the power plug is still in the socket and the switch is turned on. 2. Make sure you actually have power to the outlet point and that a fuse has not blown. 3. If you open the fridge door and the interior light does go on then it is safe to assume the power supply is live and connected. 4. It is possible that the thermostat has failed and is not switching on the electrical compressor circuit. 5. Other than you doing the very basic things as I have listed above there is nothing more you can do than to ring a serviceman.
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