How do i make sure my Refrigerator is working fine?

1. Make sure the cord is plugged in and that the breaker hasn't tripped.
2. Check the settings on the temperature control if the fridge is too warm or too cold. This is the dial that's usually located at the top front or right rear of the refrigerator.
3. Note the ambient temperature of the kitchen. If the fridge seems to be running for a long time, it may be that the room is just warm. If that's not the case, make sure the door isn't being left open and that the door gasket is sealing.
4. Vacuum the coils under the fridge. Dust may be keeping them from cooling properly.
5. Be sure that the appliance is at least 4 inches from the wall to ensure enough circulation to the coils on the back.
6. Notice if the light comes on, but the motor doesn't run. The temperature control may be turned off. If the control is properly set, you may have a bad thermostat.
7. Change the switch if the bulb is staying on when the door is shut. You can check this by pressing the button located along the hinged side of the door. The light should go off when you press it.
8. Listen for unusual noises. Are the shelves rattling? You may need to tighten the supports on the back wall. Items on the shelves may also be the cause of the sound, such as glass bottles clattering together.
9. Remove the base grill. Is the defrost pan the culprit? Make sure it's on its tracks and that the felt pads are in place.
10. Check the condenser fan under the fridge. Sometimes paper stuck in it makes a racket. If there is something there, be sure to disconnect the power before you attempt to remove it.

In my experience most people can tell if a fridge is not working as soon as they open the door due to either food expiring or milk being warm. In some extreme cases they may not notice for a few days, but in the end anyone would realise. Maintenance guides are now normally available with purchase and online. Hope this helps (quite a wide question).

My fridge freezer is making a lound swishing noise when motor is running, there also seems to be a build up of ice on one side in freezer compartment