Question about Jenn-Air JSD2789GEW Side by Side Refrigerator
The coil keeps freezing up and refidge side gets warm. Is it the heater malfunctioning?
I disagree with the first solution. Although well intended, it is evidently for an older model. It leaves out a key part that can fail. It also incorrectly indicates that the defrost thermostat and defrost heater are two separate items (they are, in fact, a single assembly) Also, no specifications are given for testing this part.
I suggest proceeding as follows:
If there is a buzzing noise coming from the top of the refrigerator section (it will originate at the back rear corner looking into the refrigerator) the problem is a defective adaptive defrost board. You will need to remove the panels from top of the refrigerator in order to access this part. Replacements are available from most parts dealers and websites. Of course, you should unplug the refrigerator before starting this work. Once the replacement is completed, follow steps 1-4 below to remove ice accumulation from the evaporator coil.
If there is no buzzing sound from the refrigerator section, proceed as follows:
1. Unplug refrigerator.
2. Remove all wire baskets from the freezer section.
3. Remove the panels from the rear of the freezer section (two panels and four screws).
4. Use a hair drier to remove all accumulated ice and frost from the evaporator coil. Use a flashlight to verify that all frost has been removed. (Stop here and replace panels and baskets if you replaced the adaptive defrost board. Otherwise, proceed)
5. Unplug the defrost thermostat/heater assembly. Test the resistance of the thermostat with a multimeter. It should be around 240K ohms. Also, test the resistance of the heater. It should be around 20 ohms.
6. If the assembly fails either resistance test, it should be replaced. If both tests are passed, reconnect the thermostat/heater assembly and proceed.
7. Check the operation of the fan above the evaporator coil. This can be done by briefly running the refrigerator with the rear freezer panels removed. Observe the fan when the refrigerator starts (keep fingers away from the fan blades!). If the fan spins and circulates air, it is OK. Ifr not, it should be replaced.
8. If the fan and thermostat/heater check out OK, then it's back to replacing the adaptive defrost board. This board contains both mechanical and electronic components. The electronic components can fail without causing the buzzing noise described above. If the fan and thermostat/heater are OK, this board is the only other part that can cause this problem.
Posted on Feb 15, 2010
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! P.s Please don't forget to rate my solution Thanks! Mike
Posted on Jul 23, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
You have a defrost timer behind the front kick plate turn
it clockwise slowly until compressor and fans stop. Once this happens the timer
should remain off for 30 minutes and the defrost heater should come on during
the first 15 minutes. If after 30 minutes the defrost timer part=> 215846602 Defrost Timer Assembly
should come out of defrost and the compressor and fans should restart, if not
advance the timer clockwise until they start and replace timer. Try that first
and tell me what your results are. If that is not the problem then we can
narrow this down to the defrost heater=> 218657301 Defrost Heater
or 5303917954 Defrost Thermostat How to test the defrost heater is
found on same page as the defrost heater. If you have any questions I will be
here to help you, Thanks Sea
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