If you can hear the compressor running then its likely to be ok. If you are on fast freeze then the compressor should be running all the time until the low temperature is achieved. If the compressor is cutting in and out it could well be a thermostat problem. If the compressor is running continuously and it still won't cool down then either the system is down on gas or there is a door gap, letting warm air in.
John
June 2008
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