Whirlpool WRF954CIHV Service Manual page 32

DIAGNOSTICS
Dispenser and IB Duct Heater (Door) Troubleshooting
Remove dispenser UI and locate Dispenser heater wiring connector (2 wire connector, 1 red, 1 white).
Neutral
+12.7 VDC
Heater Resistance Checks
• Disconnect the 2 Pin Connector (Figure 8).
• Take resistance reading on side leading to visible heater
(Dispenser Heater). Reading should be ≈108 ohms.
• Take resistance reading on other side of connector (IM Duct
Heater--Door). Reading should be ≈108 ohms.
Mullion Heater
The Mullion heater resistance can be checked at multiple points. The easiest is under the left hinge cover, or at the heater itself.
Neutral
+ 14 VDC
Heater Resistance Checks
Check the resistance of the Mullion Heater. Reading
should be ≈17 ohms.
Run Service Test 63 - Vertical Mullion Heater Test
• Ensure LED display shows "on"
• If LED display does not show "on", replace Eyebrow UI.
If all checks are OK and problems persist:
French-Door Bottom Mount Refrigerator
n
1-28
For Service Technician Use Only
WH
J8-2
RD
J8-1
Dispenser UI
Pin 2
YL
J2-3
BK/YL
J2-4
Pin 1
Eyebrow UI 2 Pin Connector
Left Hinge Cover
IM Duct
Heater
2 Pin Connector
behind Dispenser UI
Run Service Test 70 - Dispenser Heater Test
• Ensure LED display shows "on"
• If LED display does not show "on", replace Dispenser UI.
If all checks are OK and problems persist:
Run Service Test 87 - Dispenser Heater Activation Mode
• Use up or down arrow to change activation mode to "01"
• Press the "Icemaker2" key to confirm selection.
Pin 2
YL YL
BK/YL BK/YL
P in 1
4 Pin Connector 2 Pin Connector
behind Dispeser UI at Mullion Heater
Run Service Test 85 - Vertical Mullion Heater Activation Mode
• Use up or down arrow to change activation mode to "01"
• Press the "Icemaker2" key to confirm selection.
Pin 2
WH
Dispenser
Heater
RD
Pin 1
Pin 2
WH
Mullion
Heater
RD
Pin 1