42
Fan replacement
Tools:
1/4" nut driver
#2 Phillips-tip screwdriver
To remove the existing fan:
1. Disconnect the existing fan positive (+) wire
connector and negative (-) wires. See Figure 5-7.
2. Remove the existing fan and bracket from
sump. Save the screws, and spacers to
reinstall the new fan.
3. Reverse steps 3 to 1 and refer to Figure 5-7
to install replacement fan.
Figure 5-7. Fans, wiring and connections.
Fan replacement requires removal of the
refrigerator from the enclosure.
The RV manufacturer may have installed additional
brackets and screws. Always, double check for
additional screws and brackets before attempting
to remove the refrigerator from the enclosure.
IMPORTANT
Checking Thermistor Resistance
To check thermistor resistance:
1. Disconnect the thermistor from the harness.
2. Set the multi meter to ohm meter function.
3. Connect probes to thermistor terminals.
Out of range thermistor measures less than
120 Ω or more than 250 kΩ.
Open thermistor reads O.L. (open).
+ Fan RED lead
+ Fan RED lead
– Fan BLACK lead
– Fan BLACK lead
Flapper Assembly
The flapper assembly, shown in Figure 5-8, 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 DC power
through wires foamed into the door liner.
The heater turns on when the spring pins, on
the hinge side of the door, make contact with
the permanent contacts located on the side of
the fresh food cabinet. See Figure 5-8.
For the heater to turn on, both fresh food
compartment doors have 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 surface facing away from the fresh food
compartment should be slightly warm to the touch.
If the surface feels cold to the touch or has
moisture accumulation, troubleshoot the heater:
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 measure-
ment should read approximately 40 to 47 Ω.
Replace the flapper assembly if the heater
is open, of if the resistance is not within the
values given in step 3.
A shorted heater will cause the F1 in the
power board to blow, causing the refrigerator
to lose DC power.
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