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Repeated opening or prolonged opening causes the refrigerator to lose cooling as well as goes for wear and tear. So, how long should a refrigerator last is up to you, if you want your refrigerator to last upto 14 -17 years, you should take care of the factors that determine the lifetime of the refrigerator.
The only practical way to determine how long a refrigerator runs each day is to connect a run-time counter to the compressor motor circuit and operate the refrigerator for one to two weeks, or longer, then read the total run time from the counter and calculate the average number of hours the refrigerator ran each day.epends on the size of the burner, if the unit is 5000 btu's ,(probably much smaller), but it makes the math easy that would run a fridge (full throttle) for 20 hours. The fl â¦ ame cycles, so it won't use that non stop.