LG FH4A8JDHK2N Series Service Manual page 25

7-3. HOW TO CHECK THE WATER LEVEL FREQUENCY
Touch the Rinse+ and Temp button simultaneously.
7-4. HOW TO CHECK THE TEMPERATURE OF EACH THERMISTOR
AT OPERATING CONDITION.
Touch the Temp. and Rinse Hold button simultaneously.
The digits indicate the water level frequency.
For example, if 255 is displayed
the water level frequency is 25.5kHz (255X0.1)
Thermistor in tub temperature
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