LG LFC24770ST Service Manual page 37

10-2 Sheath Heater
Function Sheath heater is a part for defrost. All heating wire is connected to only one line. So we can
decide part is defect or not when we check the resistance.
How to
Measure
Set a ohmmeter connect to The 2 housing pin.
Measure the 2 pin connected to Sheath Heater.
If the ohmmeter indicate (V°øV)/Watt=R is good condition,
ex) when watt=350w, voltage=115v R=(115°ø115)/350=38 Ω
But the ohmmeter indicate infinitely great
Sheath heater is disconnection
Standard Sheath heater (at all temperature)
Test Point Ressult
(1) to (2) 34 ~ 42Ω
37
(1) (2)