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Replacing Evaporator Using the Brazing
Method
Parts Needed:
Freezer Evaporator
•
Drier Assembly
•
Access Tube (part # WJ56X61)
•
Heat Shield Kit (part # WX5X8926)
•
Caution:
A heat shield kit is required for this
procedure to prevent damage to the plastic interior
(liner) of the freezer compartment.
Unplug the refrigerator.
1.
Remove the rear access cover and evacuate the
2.
sealed system.
Remove components necessary to expose the
3.
evaporator. (See
Evaporator
.
)
Note the location of the thermistor and over
4.
temperature thermostat on top of the old
evaporator and remove.
Remove heater from bottom of evaporator and
5.
discard. Bundle remaining wires and tape high
on the back wall of freezer.
Apply a liberal amount of thermal paste to
6.
suction line where it enters the rear wall of
freezer.
Insert the brazing shield behind the joints of the
7.
evaporator inlet and outlet to protect the liner.
Use torch to heat the joints of the evaporator
8.
inlet and outlet, separate the joints and clean
the suction line and the capillary surface.
Loosen the 2 Phillips-head screws that hold the
9.
evaporator in place. Note locations of the heat
transfer wires at the sides of old evaporator.
These are needed to transfer heat to the turns of
the evaporator during the defrost cycle. Remove
the transfer wires and save for new evaporator
installation. Remove the old evaporator.
Install the new evaporator and tighten the 2
10.
Phillips-head screws.
Connect the evaporator inlet and outlet to the
11.
suction line and capillary tubes.
Check that the thermal paste is still on the
12.
suction line where it enters the rear wall of the
freezer. If not, apply paste. In addition, apply
thermal paste around epoxy joints on the new
evaporator to prevent the heat from damaging
joint integrity.
Move the brazing shield behind the capillary and
13.
suction line joints. Protect the freezer
fl
oor from
molten solder during brazing.
Angle torch so that
fl
ame is directed away from
14.
rear wall when brazing. Braze suction line and
capillary to new evaporator.
Remove the brazing shield. Clean and inspect all
15.
joints.
Remove the old drier by cutting the halo loop
16.
as close as possible to the drier. Install the
new drier assembly making sure that there is
suf
fi
cient space between the tubing.
Install the access tube. Clean and inspect joints.
17.
Replace the
18.
heater supplied with the evaporator.
Reinstall the over temperature thermostat,
thermistor, and heat transfer wires at the sides
of new evaporator. Dress wiring.
Evacuate and charge the system. Use original
19.
factory charge quantity of R-134a. (See
Evacuation and Charging Procedure
.)
Replace all component parts in the freezer.
20.
Reinstall the rear access cover.
21.
