Subzero 650 fridge temp says 34 but is really about 50
Subzero 650 10+ years old fridge temp says 34 so unit wont cool. I put an external thermom in it and temp is really in the 50s. I turn it off for awhile and then on and the temp register goes up realizing that it really isnt 34 and unit starts working and cooling down. Then an hour later it says 34 again and it is really 50 and not cooling. I did this 4 times.
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Along with the service light, are you getting any fault codes with it (like EC and a number)? Under normal conditions, this would mean the the unit as a whole is running too much and needs to be cleaned. If cleaned and this is still an issue, you may need a certified person to look for cooling issue that only the computer is seeing. This can happen in a unit the is about 10-15 years old, normally in the fridge section. Do you have a ice ball or frost on the the back wall of the fridge section around the meat slide shelf? this would b a tell - tell sign of a cooling issue. If in doubt, call SubZero dIrectly at 800-888-7820 ask for a certified dealer to take care of you. Not every service company can work on the SubZero unit. (You want certified!)
This freezing can be caused by some debris in the drain slowing the drain, or it can be caused by a weak fridge compressor, dirty condenser, or refrigerant leak somewhere in the system causing the cooling cycles to run too long and freezing the drain. this is usually accompanied by a "service" or "vacuum condenser" warning flashing between the temp readings in the display. If you have one of these warnings, you are probably in for a big repair, the parts will be covered under a 12 year warranty depending on the age of the unit and only if you use an authorized servicer. If no warning lights are present, you can order a fridge defrost drain heater kit and install it, and that will keep the drain line warm so that it doesn't freeze and back up. the easiest way to defrost that drain is to purchase a small handheld steamer form a drug store and use steam to clear the line. Good luck!
You need to check the following to make sure your fridge is working properly:
Vent blockage - Air flows between the freezer and refrigerator sections to provide proper cooling via air vents.
Condenser coil - When the condenser coil is dirty it causes the sealed system to overheat and therefore the refrigerator will not cool properly.
Defrost Cycle - When the refrigerator goes into defrost, the cooling mode stops and a defrost heater energizes to remove accumulated frost from the evaporator (cooling) coil, which causes the freezer temperature to rise slightly.
Proper Air Circulation - Refrigerators require a specific amount of clearance around the cabinet to allow for air circulation. If the refrigerator does not have the minimum clearance required, the refrigerator cannot cool properly.
Hope this helps.
freon and a compressor is about as easy as it gets....Loss of freon will cause erratic cooling...also if you can feel it touch the compressor after it shuts off if if feels like its really hot ....bad compressor that kicks an internal breaker....bad news then
time for new one
also only a airconditioner man can put freon in no 12 . but freon will stay for 50 to 80 years for i tested some old fridges and still cool fine.