Norcold 121X series, Service Manual

Page: 52 / 100

50
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ection
6
Flapper Assembly
The flapper assembly, illustrated in Figure 6-
8, is hinged to the left fresh food compartment
door. It acts as the vertical sealing surface
for the fresh food compartment doors inboard
gasket.
The flapper is equipped with a 12 volt DC
moisture reduction heater. The heater is
supplied power through wires foamed into the
door liner.
The heater is energize when the spring pins
on the hinge side of the door make contact
with the permanent contacts on the side of the
fresh food cabinet.
For the heater to power on, the left fresh food
compartment door has to be fully closed.
Powering on the refrigerator automatically
energizes the flapper heater circuit.
Heater operation can be detected by touching
the exterior surface of the flapper assembly..
The overall surface should be slightly warm to
the touch.
If the flapper surface feels cold to the touch or
is wet, troubleshoot the heater as follows:
1. Check for bent, broken or missing spring
pins.
2. Check door alignment. If needed align door
so all spring pins make full contact with the
center of the contacts on the cabinet.
3. Check heater resistance. Resistance reading
should be approximately 40.6 to 47.2 ohms.
Replace the flapper assembly if the heater
is open, shorted or if the resistance is not
within the values given in step 3.
Figure 6-8. —Flapper assembly, left door, fresh food
compartment.
Flapper assembly
Left door
Fresh food cabinet
Contacts
Spring pins