Is  Er-IS   displayed?
Yes
Yes
Yes
No
No
Yes
Housing-A
Display
PCB
 
BL
BL
BL
BL
Icing-Sensor
CON101
1
2
1
2
1
2
Is the connection loose? 
Reconnect
pin1 BL
pin2 BL
Icing Room Sensor Error
1.156 ~141.5k‰pin1 to pin2
ResultTest Point
Icing room Sensor Resistance
Replace the
Icing-Sensor
(1) To (2)
Test Point Result
1.4 ~120k‰
Checking Open or Short of wire
pin2 BL
pin1 BL
Replace
Main PCB
If the ER-IS appears,
Replace Main PCB
Otherwise, explain 
to the customer!
Reconnect and Power ON
Display PCB Inner of Icing door
Is resistance value between 
pins 1 & 2 of Housing- A as 
below? (BL to BL) 
No
Disconnect CON101 and
measure the value. Is resistance 
value between pins 1 & 2 of 
CON101 as below?  (BL to BL) 
Wiring diagram