Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

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Subzero 550 Gurgling whenever door closes

Whenever we close refrigerator door we here gurgling of water somewhere low in the refrigerator or above the freezer

We do not have a water line running to the freezer and do not have an ice maker

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Personally it does not bother me that much on mine. But since you asked, there is drain line that runs into the drip tray underneath. The line should not have any bends in it to form a P-trap which will hold enough water in to form a seal, so when the door closes and the pressures equal you have a gurgling sound. If it really bothers youtry these steps, remove the kick plate by removing the two phillips head screws on either side. The drip pan is suspended in the middle of the support and will probably have water in the drip pan so put a towel down before you start. Once off shine a light to see if the tube has a bend in it. Depending on when it was made there may be a clamp that hold the drain tube in place. Carefully pull the hose past that clamp to remove sag and eliminate the bend which forms the P-trap. You have to be careful as the hose maybe brittle and come apart. So if you pull to hard you may wind up replacing that line which requires pulling the unit at considerable cost. There is a check valve that can be ordered but was only used for a short time. The inline check valve was a part number 4202130. If it bothers you too much and don't want to try the fix here is the Sub Zero locator page for parts and service. http://www.subzero.com/locator/locator.aspx?type=0&zip=02030

Posted on Dec 05, 2008

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Personally it does not bother me that much on mine. But since you asked, there is drain line that runs into the drip tray underneath. The line should not have any bends in it to form a P-trap which will hold enough water in to form a seal, so when the door closes and the pressures equal you have a gurgling sound. If it really bothers you try these steps, remove the kick plate by removing the two phillips head screws on either side. The drip pan is suspended in the middle of the support and will probably have water in the drip pan so put a towel down before you start. Once off shine a light to see if the drain tube located 2/3rd the way back in the center andh is 1/2 inch in diameter made of clear plastic w/white band reinforcing it, has a bend in it. Depending on when it was made there may be a clamp that hold the drain tube in place. Carefully pull the hose past that clamp to remove sag and eliminate the bend which forms the P-trap. You have to be careful as the hose maybe brittle and come apart. So if you pull to hard you may wind up replacing that line which requires pulling the unit at considerable cost. There is a check valve that can be ordered but was only used for a short time. The inline check valve was a part number 4202130. If it bothers you too much and don't want to try the fix here is the Sub Zero locator page for parts and service. http://www.subzero.com/locator/locator

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