As long as your refrigerator worked properly before you unplugged it, you should not worry that something has happened to the refrigerator that is now causing it not to work. It is much more likely that a change occurred within the electrical socket. Determining why the problem exists and remedying it is not especially difficult, but to ensure that you are addressing the correct issue, it is important that you check a few different possibilities.
Press firmly on the plug when plugging the refrigerator back into the wall outlet. There is a distinct possibility that you simply haven't fully inserted the power cord.
Plug another electrical device into the same outlet you are using to plug in the refrigerator. If the other device does not work, the problem you are experiencing is with the electrical supply, not the refrigerator itself.
Insert the prongs of an ohmmeter into the top two holes of the outlet. Depending on the kind of ohmmeter you use, the device will either light up or the needle on the device will move and point to a number, assuming that the outlet works. If the outlet does not work, nothing will happen.
Plug the refrigerator into a different outlet in the kitchen. If the appliance works when it is plugged in elsewhere, you know you need to fix the outlet your refrigerator was using.
Check to see if other kitchen appliances and devices that are plugged in are working. There is a chance that the entire room has lost power due to a power surge.
Open your breaker box and slide the breaker switch associated with your kitchen to the "On" position if it is turned off.
Replace the light bulb in the refrigerator. If the fridge's light bulb is burnt out, it can be difficult to immediately tell if the refrigerator is working or not thanks to the fact that it takes several hours for a refrigerator at room temperature to cool down.
Turn your refrigerator control knob. You may have accidentally or purposely switched the control knob in your refrigerator to the "Off" position. Turning the knob to any position other than "Off" will allow the refrigerator to work.