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How to enter forced defrost cycle on a KitchenAid refrigerator with mechanical controls and ADC

Posted by Samurai Appliance Repair Man, in Refrigerator Repair 17 May 2011 · 2,012 views

ADC - Automatic Defrost Control, uses an electronic board instead of a mechanical timer to determine defrost cycles.

Example model number: KTRC22KKWHOO

STEPS TO ENTER ELECTRONIC DEFROST CONTROL TEST MODE (IF APPLICABLE)
OPTION #1 STEPS (BI·METAL CLOSED):
#1 - POWER OFF TO REFRIGERATOR FOR AT LEAST 30 SECONDS
#2 - THERMOSTAT OFF
#3 - POWER ON TO REFRIGERATOR

OPTION #2 STEPS (BI-METAL CLOSED)
#1 - THERMOSTAT OFF 15 SECONDS
#2 - THERMOSTAT ON 5 SECONDS
(REPEAT STEPS 1 AND 2 TWO MORE TIMES)
#3 - THERMOSTAT OFF

ENTER TEST MODE

IN 3-8 SECONDS, CONTROL WILL TURN ON DEFROST HEATER.
DEFROST HEATER WILL TURN ON FOR 18 MINUTES OR UNTIL BI·METAL OPENS.
TO TERMINATE TEST EARLY, REMOVE POWER FROM REFRIGERATOR.
NOTE: IF OPTION #2 DOES NOT WORK, TRY OPTION #1 BEFORE REPLACING CONTROL.
ALWAYS CHECK CONNECTIONS BEFORE REPLACING CONTROL.
HELPFUL HINT: UPON ENTERING TEST MODE, A RELAY TURNS OFF THE COMPRESSOR AND TURNS ON THE DEFROST HEATER.
LISTEN FOR THE RELAY TO CLICK.
IF RELAY CLICKS ONCE UPON ENTERING TEST MODE, CHECK FOR DEFROST HEAT.
IF RELAY CLICKS TWICE (ALLOW UP TO 30 SEC BETWEEN CLICKS), CHECK FOR BI·METAL OPEN.
* * IF BI·METAL IS BY·PASSED FOR TESTING (IF APPLICABLE), DO NOT OVERHEAT EVAPORATOR AREA.



To learn more about your refrigerator or to order parts, click here.


Source: kitchenaid defrost cycle




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