It is a kenmore with freezer on top about 10yrs. old. Works good other than the bang when it shuts off.
When you look at the compressor of a refrigerator, what you see is actually just an outer case. The compressor is inside that case, supported on four springs. If you give a compressor a shake (even a new one) you will hear the inner compressor part knock on the outer case. Sometimes, if a spring brakes or gets weak, when the compressor stops running, the momentum will then cause it to strike the outer case, causing a loud knock or two. Most refrigerators will work fine for many years if this condition occurs. It is a bit annoying, but the only fix would be to replace the compressor, which is generally prohibitively expensive if the unit is no longer in warranty. Please don't bother rating this solution, as anything but a Fix-Ya lowers my overall score. Thanks.
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If there is no cooling at all on the fridge section but the freezer works then it is confirmed that the compressor and gas pressure is OK. Now shut off the fridge and leave it powered off while you clean and check the evaporator for frost. If frost is seen it is a good indication as the compressor is working with sufficient gas within.
Now after about 6 hours plug in the fridge to start. Observe cooling to happen in about one hour and ice to from under three hours.
Earlier make sure that the thermostat was set to normal mode for freezer and fridge.
However if ice forms in the freezer then observe the fridge for about 24 hours for cooling to continue and the fridge to cut off . If not the auto defrost timer, or the thermostat must be checked. Frost formation without defrosting could block the air flow and so shut the air passage to the fridge. Also the blower fan must work and if this is not working then the fan can be faulty. Also a fault on the control unit is a suspect to non functioning of any one of these components.
If defrost timer works but frost keeps forming check while the compressor shuts if the heaters are working, check continuity of the heaters.
So try this test using a multi-meter on the defrost timer and the thermostat and make your observations so that we come to the solution.
Please check the link below for tips to remove the panels/parts:
http://www.espares.co.uk/advice/fridges-and-freezers/a/2
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