The following procedure will initiate the defrost cycle on Inglis/Whirlpool refrigerators with adaptive defrost control DTT
1. Unplug refrigerator
2. Turn Cold Control to “off (Compressor is off)
3. Plug in refrigerator
The defrost cycle has now been initiated. The DTT has a bypass/test point for diagnosis. To terminate defrost manually:
1. Unplug the refrigerator
2. Turn the cold control “on” (Compressor is on)
3. Plug in the refrigerator
The defrost cycle is terminated and refrigeration cycle resumes.
Maytag requires a jumper between L1 & Test on the adaptive board, when the cold control is closed. This changed in all the 2003 Maytag models where the cold control has to be cycled on & off three times in less than six seconds, and left in the on position - eliminating the jumper procedure. G.E. Arctica usually requires a jumper between J4 and J9 on the main control board. The jumper must be left in place for defrost diagnosis. Knowing the method to "force defrost" and using a clamp-on ammeter for diagnosis eliminates the time-consuming emptying of the freezer, evaporator cover, and testing the heater, defrost thermostat, and in some cases the NTC thermistor with an ohmmeter.
Frigidaire (01/18/02 all mechanical defrost timers eliminated from their SxSides). To force a defrost the light switch must be toggled
Frigidaire A.D.C (Automatic Defrost Control) – Adaptive
To initiate defrost cycle toggle Fresh Food light switch - 5 times in 6 sec.
- To cancel defrost cycle toggle F/Food light switch - 5 times in 6 sec.
- After defrost cycle test cancellation, compressor runs immediately, 1 min. delay for evaporator fan.
- After regular (non "forced") defrost – 6 min. delay for compressor
- 7 min. delay for evaporator fan
- Vacation mode: if heaters on for less than 6 min. or F/Food door not opened for 24 hrs -------- then 72 hr. defrost timing interval is set up. When door later opened, defrost reverts to previous pattern.
- Two different boards (not interchangeable). Top mount board may be subbed temporarily to a standard defrost timer ------- SxSide cannot be subbed (evaporator fan is controlled by A.D.C.)