The client has a built-in Sub Zero stand-alone freezer. The initial problem was Sub Zero 601F freezer not cold. As he explained to me the freezer was running almost all the time and hardly maintain the temperature. Also, he had the service on the screen.
I connected my gauge set to the unit. Pressure on the high side was very low. It is the sign of an inefficient compressor for me. The compressor has a hard time to maintain the temperature, run all the time and that’s why the client had the service light on the screen. Also, I found the clogged drain. As result to that, all the defrosted frost from the coil was coming into the freezer and made huge ice buildup.
I offered to replace the compressor, dryer filter, recharge freon, remove frost and clean the drain.
Here are the steps which I followed during the repair.
First I removed all shelves, cover, icemaker and the back wall. This allows me to have access to remove huge frost build up. Using the steamer I melt down frost and cleaned the drain tube. This is the tough challenge because there are lots of wiring in this solid chunk of ice. I always turn off the power to the unit not to cause short during melting down the ice buildup. After that, I install all components back to the unit.
Second I removed the bottom grill and cover. I cut the old compressor and clean the area around. I installed new compressor and weld all copper pipe connections to it.
Third I cut an old dryer filter and welded the new one. Also, I cleaned the condenser coil as part of the unit maintenance.
Fourth I recharge the system with the proper amount of the freon, which is specified on the label.
Another happy customer!
