Whirlpool WRF954CIHV Service Manual page 29

FC Defrost Troubleshooting
Diagnostics has several Service Tests to aid in troubleshooting the FC Defrost system.
Neutral
P1-2
115 VAC
P2-7
GF2 Board
Run Service Test 04 - FC Evaporator Thermistor
• Ensure none of the thermistors are Open "OP" or Shorted
"SH". Replace any faulty thermistors.
Check Heater and Thermal Fuse Resistance
• Test resistance between GF2 board, P2-7 and P1-2
• Resistance should be approximately 29 ohms.
If Circuit is Open:
• Access FC Evaporator section and check for open Defrost
Heater, or Thermal Fuse(s).
If Circuit is OK:
Run Service Test 89 - Run FC Defrost Heater
• Test for 115 VAC power at GF2 board, P2-7
If 115 VAC is not present:
• Replace GF2 board
For Service Technician Use Only
WH/BK WH/BK
Pin 3
PK PK
Pin 2
6 Pin Conector
FC Evaporator Area
Top Right Side
Single Pin Connector
Thermal Fuse
YL
YL
Thermal Fuse
If 115 VAC is present:
Check for and repair, loose or damaged wiring or connectors.
If all functional components of FC Defrost system check fine,
check for a secondary cause of the problem, such as:
• Bad FC Door Switch (Service Test 75)
• Bad FC Evaporator Fan (Service Test 56)
• Air leak into the FC
If Necessary, Run Service Test 91 -- Forced Defrost
Run Service Test 91 and select ON. Press the "Icemaker2" key
to confirm your selection. A defrost cycle will begin after exiting
Diagnostics.
French-Door Bottom Mount Refrigerator
FC Evaporator Area
Top
Pin 1
Pin 1
Single Pin Connector
FC Evaporator Area
Top
DIAGNOSTICS
FC
Defrost
Heater
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