Your defrost timer is not working.
SOURCE: ice build up in back section of a Whirlpool no frost top freezer refrigerator 66"hx30"wx27"d
your sure the defrost cycle works? sounds to me its not. you need to remove the freezer back and check the defrost components. or put it in the defrost cycle and see if it is working. to get that much frost as you describe the dor would have to be left open. also check all door seals. let me know what you find and we can go from there
SOURCE: Cold Freezer Hot refrigerator
I'm having the same problem with a Haier Model HTE18WAAWW.
Water is dripping into refrigerator section from the freezer section. Eventually, refrigerator section was not cooling adequately. Freezer was freezing, but there was eventually ice crystals inside similar to hoarfrost. (See Google images for hoarfrost if you're not sure what hoarfrost is.)
I turned off and unplugged unit for several hours while I removed the floor pan and internal back panel in the freezer. There was ice built up in the evaporator drain pan that was blocking the air flow of cold air from the evaporator into the refrigerator. I melted the ice with a hair drier plugged into a GFI outlet for safety.
I dried everything off. I could not find evidence of water going down the condensate drain tube below the evaporator to the condensate drain sitting on top of the compressor. I tried running a coat hanger down the drain line to no avail. I poured hot water down the condensate drain line to no avail. I put everything back together. Works fine as far as cooling and freezing, but water is still dripping into the refrigerator.
I think the defrosters are okay unless the heater strip below the evaporator is burned out. I base this on the fact that there is no condensate around the door gaskets even though the temperature in the house is hot and humid. I may have to Ohm that heater out. I'm thinking the drain line is clogged for the condensate drain. It may need longer defrosting.
If longer defrosting don't work, I'm thinking I need to rethink how to clean out the condensate drain line. Maybe low pressure compressed air???
SOURCE: Ice build-up around the fan making a noise.
Drain line froze.
Used hair dryer to thaw frozen line, works OK now. 01/07/09
Think the frozen drain line was caused by the light in the refrigerator not shutting off when the door closes, causing excess cooling in the freezer. Poor design on the light shutoff switch, corrected design to make permanent repair
chestnutlee.
SOURCE: Ice is building up on back wall of a frost free refrigerator
Your defrost system must be on the blink. The defrost system is used to keep slabs of ice from forming and disrupting flow of air to that fresh food compartment. In the old days grandma would just unplug the unit every 2 weeks and place a chair in front of the the ice box, holding the door open for an afternoon to kill the frost buildup. Then came the modern frost free icebox. Every 8 hours the timer would kill the compressor and kick in a heater to melt that old frost. A bi-metal thermostat was installed in line with the heater to shut it down at 50 degreesF, then the ice box would just keep quite and set a spell (21 mins) then like magic the ice box would roar back to life, get cold, and chill out. That is until you opened the ice box door and violated grannys 3 second rule and caused the compressor to come roaring on and scare the cat half to death. Nowadays instead of timers(we don't need no stinking $2 timers) we built in computer boards with fancy sensors to monitor capacitance changes in the evaporator coils and issue orders from main computer board to defrost board to commence defrost cycle all the time monitoring for any changes in our daily habits, taking in consideration of how many times we peek into the ice box and look at grandmas strawberry shortcake. Keeping up with each and every ice cube we consume and checking the temperature and quality of our water and ice in the door. OH my! So what could go wrong? Well barring hurricanes, tornatoes, thunderstorms, earthquakes, and other natural disasters, all ice boxs still need a heater and a thermostat. I would start there. Of course if you had have specified a particular model number and brand so that a date age and a few components could have been looked at then I could have posibly given a more specific answer.
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SOURCE: refrigerator model BR18 has a defrost problem,
well there is a few things to check like defrost thermostat, timer or heating elements, give me a call and i can walk you through it for free..whirlpoolpartssurplus.com
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