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Re: Constant build up of ice on the freezer lower shelf
Sounds like you have a clogged defrost drain tube. removing back panel of freezer will give you acess to drain trough, melt away the ice with a hair dryer, youll find a drain hole under there somwhere,pouring boiling water down the drain will clear it pretty quickly( i use a steam machine purchased from the infomercials works awesome, after you clear it and all water drain down tube wrap a piece of solid copper wirearound the heater( black calrod heater right above the drain trough) and stick it in the whole maybe an inch or so. now everythime the heater comes on to defrost it will prevent the hole from freezing over
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You are having an automatic defrost problem. there are 3 components in that system and it could be any one of the 3 .
There the timer (most common) heater, and the bi metal terminator the heater and bi metal can be tested with an ohm meter and the timer if mechanical can be rotated into a defrost
Your defrost drain hole may be plugged or frozen over. Open the freezer door and remove the lower shelf and basket so you can get to the back evaporator cover, and right under it is the drain hole. Remove what ice may be built up and pour very hot water into drain. It helps to have a syringe to remove the water and pour more hot water into drain. Then use a wire or other flexible tubing to poke into drain to clear restriction then flush with water.
the defroster isn't close enough to the drain to be effective. remove the back wall of the inside of the freezer, remove the excess ice. clear out the ice from the drain using hot water and a turkey baster. there is a kit from whirlpool that uses a piece of metal and a screw around the defrost rod, but I found out that a piece of 14 gauge solid core wire with the insulation stripped off works great too. stick the stripped wire into the drain, 2 to 3 inches, and wrap the rest around the defrost rod.
When your refrigerator defrost the condensation has no place to exit to because of a restriction in the drain and that could be water that has turned into ice or possiably a food partical or foreign object. Defrost it compleatly by leaving freezer door open for aprox. an hour at least make sure ref is level front to back an d you should not have this problem anymore. Please rate me and let me know if this helped. Thanks
The problem is ice build up on the back wall. The noise you hear is the fan blades hitting the ice. On the back wall water gets trapped, it then builds up over time, and a big ball of ice forms and blocks the fan. Take off the back wall, defrost the build up and cut the insulation off as above. The water will no longer get trapped and the problem will not come back.