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Heavy frost in freezer, warm refer compartment.

We have a K.A. KTRS22K refrigerator, top freezer. Just recently the stuff in the refrigerator spoiled. There was a large amount of frost in the freezer, and after unloading the refrigerator to let it defrost open to the 75 degree garage I removed the 1 shelf in the freezer and the bottom pan. Ice still in there after 5 hours. Question, suspect bad defrost timer?
I blew out the condenser with the air compressor. The garage ambient could hit 80 but no more. The gaskets on the freezer door are not cracked, but you can hear a small whistle after closing the freezer door.

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  • blakpot1 Jul 12, 2009

    Sweet, I do have some skills in this dept. 38 years as a HVAC mechanic. Got the meters etc. Thanks. Ice is gone after 7 hrs open to 75 degree ambient. The fan runs. I'll check the heater for continuity. Is the defrost timer suspect possibly by not entering a defrost mode? The Defrost stat, does it terminate defrost or start the fan after the timer kicked in the compressor?

  • blakpot1 Jul 13, 2009

    Well, the heater is ok in the continuity dept, same with the defrost stat, opened and closed with rise & fall in temp on the evap. outlet. Where is the timer hidden. Around back by the compressor?

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Hi, With the information you supplied i'm going to assume there is an ice build up at the rear of the freezer. Your problem is going to be with your defrost system. I will also assume you have the ability to repair this yourself. This is going to be one of three problems with your refridgerator, 1st thing to do is remove shelfs and panel in the back of the freezer...you should see ice build up on the evaporator...don't worry get a hair dryer and melt the ice. Next locate the wires for the heater...using a multi meter test the heater for condinuity...if the heater is bad replace it, If the heater is good replace the defrost thermostat..the stat normally is a barrel looking part clipped onto the evaporator pipe. The last possible problem could be the evaporator fan, have you heard the fan running in the past few hours?..if you are not sure pull the panel out to where you can see fan and watch it over an hour to see if it turns. I have included links with pictures of what the parts you need to check are: http://romulusappliance.com/manufacturers/maytag/refrigerators/575432.JPG defrost stat http://www.hotekalliance.com/UploadFiles/2008627111553382.jpg heaters http://www.applianceblog.com/archives/EvapMotor1018185.jpg evap fan. Hope this helps. If you have any other questions please feel free to comment again. If you decide to get a repair guy in should not cost you any more then $120 - $200 depending on make/model/problem Good luck!

Posted on Jul 12, 2009

  • 1 more comment 
  • Mike Price
    Mike Price Jul 13, 2009

    Yes the defrost timer is a candidate, if you have a mecanicle timer advance it into defrost cycle, if the defrost cycle begins and you see melted ice on the evaporator it's going to be the timer...some timer are built into the control board though and it's not possible to advace them...so with this your going to have to eliminate everything else before replacing the board if the timer is shot. The defrostcan be tested by checking condinuity when it's in place and before you defrost the evaporator...depending on your refridge make and model it will either show condinuity below 50f or 40f..will normally have temp printed on stat....

  • Mike Price
    Mike Price Jul 13, 2009

    Either in the console where the cold control is or take the grill off bottom front..will look up your model..will massage again if i find it.

  • Mike Price
    Mike Price Jul 13, 2009

    well you didnt give me the whole model number but i found it i think..if I have it correct its going to be in the console in the refridgerator normally located some where on the roof near the light. Mike

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