SubZero freezer not cold enough


Old 06-04-15, 08:22 PM
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SubZero freezer not cold enough

I have a SubZero 511. The freezer stopped cooling properly a couple months ago: it doesn't get lower than about 15 degrees (no matter how high I turn it up) and often it's between 20-30 degrees. The fridge is working fine though.

A few weeks before I noticed this, the defrost timer started to making noises. I replaced the defrost timer but that the freezer didn't get any colder. I also don't see any frost in the freezer, which seems to be the common symptom when the defrost timer is broken.

Any advice? Thanks!
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Old 06-04-15, 08:59 PM
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Welcome to the forums.

Although these fridges are quality units they do have their share of problems. If you had a defrost problem the coil would be full of ice.

If the compressor runs all the time but it won't get cold enough then it's low on refrigerant due to a leaking evaporator (cold coil).

How old is the unit ?
You will more than likely need to call sub zero repair service in to have the sealed system checked.
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