LG Electronics GR-P257/L257 Trouble Diagnosis, Problems, Symptom, Causes, Checks, Measures

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Problems	Symptom	Causes		Checks	Measures	Remarks
Bad cooling	Wrong	Defective Step Motor	Check Step Motor	Check if Step Motor damper	Reconnect lead
	Refrigerator	Damper.	damper motor and	motor and reed switch lead	wire.
	temperature.		reed switch and lead	wire are cut with a tester.
			wire are cut. Check	Refer to Step Motor damper	Replace Step Motor
			Step Motor damper	in parts repair guide.	damperor refrigerator
			part.		control box Assembly.
			Check Step Motor	Refer to Step Motor damper	Replace relay or	Refer to single
			damper Motor driving	in parts repair guide.	PCB.	motor damper
			relay in PCB.			driving circuits
						in circuit
						explanation.
			Foreign materials in Step	Check Step Motor damper	Remove foreign
			Motor damper baffles.	baffle visually.	materials.
			Ice formation on	Check if Step Motor damper	Replace Step Motor
			Step Motor damper	Heater wire is cut with a	damper or refrigerator
			baffles.	tester.	control Box Assembly.
		Defective refrigerator	Defective refrigerator	Check the resistance of	Replace refrigerator	Refer to sensor
		sensor	sensor parts.	refrigerator sensor with a tester.	sensor.	resistance
						characteristic
						table in circuit
						explanation.
			Refrigerator sensor is	Check the sensor color in the	Repair main PCB
			substituted for other	circuit. (main PCB sensor	sensor housing.
			sensor.	housing.)
			Defective refrigerator	Check if refrigerator sensor	Fix again the
			sensor assembly	is not fixed at cover sensor but	refrigerator sensor.
			condition.	inner case visually.

TROUBLE DIAGNOSIS