Why does the freezer compressor run constantly on my Sub Zero 650?

Something is wrong for sure. Bring them back under the warranty. Changing an evaporator is a big job, remove the gas, remove and re-solder the new one. Fill with inert nitrogen, and check for leaks, recover the nitrogen and create a vacuum and then add refrigerant by weight.

Is this noise periodically or every time the fridge cycles off? Does it sound like water dripping on a hot surface?

Sub Zero Repair Tucson

warm air will blow out from the condenser fan which is in the same area as the compressor.
There should be no warm air inside the freezer of fridge.

Buttom freezer Sub Zero. Replacing evaporator for fresh food section.

I have seen this many times and have fixed the problem many times. You may notice a ball of frost or ice build up in the fresh food compartment, This is because you have a leak in your evaporator coil and it needs to be replaced. It is a pretty costly repair but well worth it in consideration to what you paid for this unit or what the cost of a new one would be. Because it has less freon in it is why the compressor is running longer and causing message to pop up. Have the evaporator replaced in the section that is giving the issue and this will solve your problem with the unit.

Hi!! looks like you have a seal system problem..First make sure that the condensor motor is on and the compressor and indoor evaporator fan if yes..You have a seal system problem..

fridge should be about +4degC and freezer about -18degC

Most likely you have a leak in the evaporator. Subzero warranties the parts for 12 years. Call them to find out what they will cover. They are agreat company and will be fair with you.

That depends on if your model has a five or ten year warranty on the compressor. Your problem may not be warranty related. Check and see if the condenser is clean, check for a frozen cooling coil.

Turn the refrigerator off for a minute to reset the vaccum condenser light.