Ok, I have a Magic Chef 45 bottle unit I got from Home Depot a while back. It is a traditional compressor style unit, so you do hear the compressor and even refrigerant flow at times. Howeverk, periodically, I hear a popping or creaking noise. It dosn't really sound completely mechanical (like the compressor turning on or off), but almost sounds like a creak or pop from the body of the unit. The best I can compare is what you might hear from a traditional TV (tube and plastic cabinet, not rear projection) that well after your turn it off, you might hear a brief creaking pop, which I always figured was the plastic housing creaking as it called with the unit turned off.
I am trying to figure out if this is normal, or if I need to call for warranty repair. Considering we only hear this once or twice a day, I am not sure how easy it will be for the repairman to reproduce and identify what is going on, which is why I decided to post here first.
As to temp changes, in case anyone is wondering, I have a dual temp digital thermometer in the unit. I have a probe near the bottom of the unit and a probe near the top. I have a digital display with memory on top of the refrigerator.
The normal temp is 51* at the bottom of the unit(where I keep my Rieslings) and 54* on top shelf where I keep my reds. The bottom temp probe will range from 49*-53*, over the course of say a week (going by the high and low memory feature), but typically stays at 51*. The top probe is typically 54*, but will range from 53*-64*. I am pretty sure where the 64* comes in is that the unit (even thought it was sold as a wine cooler), had an auto defrost cycle that heats up the back panel periodically to melt any frost that is forming. From what I can tell, this temp rise must be pretty brief, because whenever I check the current temp is is right around 54*, but if I check the memory it has been as high as 64*, and it only the top portion of the fridge gets that hot. I refersed the probes to see if it was a probe malfunctioning, and it wasn't, so I am sure it is the defrost cycle.
Anyway, does this periodic pop/creak that I mentioned sound normal for this type of fridge, or does it sound like a mechanical problem of some kind?