Customer Questions and Answers for Refrigerator Adaptive Defrost Control Board by Whirlpool

Hello Dean. The best way to test if you are having a defrost issue is to test the heater and the defrost thermostat and see if they are good. If so, replace the timer 4388932. You can test for power coming to the timer, but without a model number we cant check the wiring diagram for this. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html

Don, The easiest way to diagnose a defrost issue, is to check the back wall of the freezer. If there is a heavy build up of frost or ice on the wall, you"ll need to circuit check the heater, thermosta and the defrost timer. Also check both the doors for a good and proper seal all the way around. If all's OK, check the evaporator fan , it may be stuck or running slow and not circulating the air properly. Good Luck

Hello Abel. The timer 4388932 is located in the controls in the fresh food section. You will need to remove the control from the top of the unit to access and replace the board.

Hello Howard. Check and see if the unit is stuck in the defrost cycle. If so, you will need to replace the control board 4388932. If the control is good, the temperature control WP2198202 in the unit will need to be replaced. Hope this helps.

Hello Mike. Check and see if the compressor is running at times, and the fan motor 4389144 is not running. If so, it will cause the problem you are having. Also, make sure the timer 4388932 is not sticking in defrost. Hope this helps.

Dale, You're on the right track, Based on your post, the temperature control WP2198202 is the most likely issue. Good Luck and Thanks

Hello Manny. Here is a link to our Repair Forum, this is a free service to our customers. Use this link to access the repair for your question. Hope this helps. http://forum.appliancepartspros.com/refrigerator-freezer-repair/193358-freezer-fridge-not-cooling.html

Hi Gary. The defrost control board is part # 4388932, located on the rt. side in the control area. There are 4- screws holding the control compartment to the upper cabinet. There are 2 rear 1/4" screws in the back outer rim. There are 2- more in the front half. You may need to use a plastic putty knife to gently remove the front label /cover part # W10124121. The control box assy. is part # 2181737. This will access the screws.

Hi Manny. If the clicking is coming out of the adaptive defrost board from the inside fresh food area/damper area, then you will replace the ADC control part # 4388932. The relay starts the compressor for operation. The relay WR07X26749 has a coil in it that is connected in series with the "run" winding in the compressor. When the power is applied, the compressor draws a high current as it is in a "stalled" state. This current is high enough to "pull" the relay in, which connects the "start" winding. This is connected through the capacitor which gives the start winding a "leading" state in electrical terms, which sets the motor rotating. As the motor speeds up, the current drops and is no longer sufficient to hold the relay up, and the motor continues to run without the "start" winding.. The neutral, or cold side of the motor is connected via a small thermal breaker which cuts the motor off if it doesn't start, until the breaker cools down, then it has another go at starting. This is the buzz and "Click" noise you sometimes hear if you turn your fridge off for a short period and then back on. The compressor often wont start if the discharge pressure is too much greater than the suction. Some compressors have a "run" capacitor as well which remains connected to give the motor a higher torque, both for starting and running states. All of this only takes a split second. Compressor kit part # W10309994. Thank You.

Hello Paul. No, the defrost timer 4388932 in the model number you provided, does more than just the defrost cycle. You will need to replace the timer if it is bad. Hope this helps.