Question about Refrigerators
I noticed that the temp in the bottom freezer section of my Subzero 611/F manufactured Dec 1999 was slowly creeping up a few days ago. (The upper fridge section is working fine.) The vacuum condenser message was also displayed. The fan in the freezer section was running fine, and there was no ice build-up that I could see. I opened up the grill to check things out. The condenser was almost completely dust free, but was quite warm, and the freezer compressor was almost too hot to touch (this unit has separate freezer and fridge section compressors.) I did notice that the condenser fan was not running continuously. It would start when I gave it a push, but then stop again after a while. I figured I had a faulty fan motor. I shut off the unit at the outlet, emptied both sections and let it sit overnight to cool the condenser/compressors down and let any ice build-up melt. I then vacuumed out what little dust there was in the condenser and around the compressors, and turned the unit back on, with a pedestal fan blowing directly onto the condenser/compressors. After about 6 hours the temp in the fridge section was back down to 34F, but the freezer section has bottomed out at 41/42F and hasn't moved in a couple of hours. Funnily enough, the condenser fan has now been happily running all this time as well. The condenser is nice and cool, but the freezer compressor is hot (though not as hot as it was before.) So, now I'm puzzled. Why is the freezer not coming down to proper temp with the two fans blowing? Is the condenser faulty?
Could be but before that check if settings are working. Set the freezer settings to coolest and see if cools. If ok, set to desired temp.
Posted on Dec 30, 2013
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Posted on Jan 02, 2017
Look in the back of the freezer, there will probably be a metal panel with a plastic vent on top.
Look through the vents in the metal panel, and you should see the shiny metal fins of the evaporator. If the fins or the vents are plugged with frost, that is your problem. The freezer will stay cold because a small amount of cold air will be forced through the frost but that will not be enough to make it up to the refrigerator portion. You can defrost the unit by removing the metal panel and allowing the frost to melt. Careful use of a hairdryer can speed up this process. This will likely be a temporary fix. The root cause of excessive frost can be caused by a bad door seal or a defective defrost circuit.
First check that the door seal is good by closing the door on a dollar bill at several points around the door, both on the freezer and refidgerator door. If you can pull the bill out with no resistance, the door is not making a good seal. Inspect the seal and make sure there isn't anything stopping the door from closing such as food, or a shelf not pushed in all the way.
If the door seal is good, the defrost system is likely defective. The defrost system has three main parts, the defrost heater, thermostat, and timer. If either one of the parts fails, the freezer will plug up with frost every few weeks. If you can troubleshoot this by manually starting the defrost cycle. Let me know if you would like this procedure.
Posted on Jan 07, 2009
You have a defrost system problem. The coils with the ice are the evaporator. If the fan is working inside either your defrost timer or defrost heater assembly has failed. you may want a tech for this
Posted on Jun 22, 2011
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