Replacing Evaporator Using The Brazing Method - GE GBSC0 Technical Service Manual

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.
1. Unplug the refrigerator.
2. Remove the rear access cover and evacuate the
sealed system.
3. Remove components necessary to expose the
evaporator. (See
Evaporator.
4. Note the location of the thermistor and over
temperature thermostat on top of the old
evaporator and remove.
5. Remove the defrost heater from bottom of
evaporator and discard. Bundle remaining wires
and tape high on the back wall of freezer.
6. Apply a liberal amount of thermal paste to
suction line where it enters the rear wall of
freezer.
7. Insert the brazing shield behind the joints of the
evaporator inlet and outlet to protect the liner.
8. Use a torch to heat the joints of the evaporator
inlet and outlet, separate the joints and clean
the suction line and the capillary surface.
9. Loosen the 2 Phillips-head screws that hold
the evaporator in place and remove the old
evaporator.
Note the location of the drain probe at the bottom
of the old evaporator. Transfer probe to similar
location.
)
– 31 –
10. Install the new evaporator and tighten the 2
Phillips-head screws.
11. Connect the evaporator inlet and outlet to the
suction line and capillary tubes.
12. Check that the thermal paste is still on the
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.
13. Move the brazing shield behind the capillary and
suction line joints. Protect the freezer fl oor from
molten solder during brazing.
14. Angle torch so that fl ame is directed away from
rear wall when brazing. Braze suction line and
capillary to new evaporator.
15. Remove the brazing shield. Clean and inspect all
joints.
16. Remove the old drier by cutting the halo loop
as close as possible to the drier. Install the
new drier assembly making sure that there is
suffi cient space between the tubing.
17. Install the access tube. Clean and inspect joints.
18. Replace the heater supplied with the evaporator.
Reinstall the over temperature thermostat,
thermistor, and heat transfer wires at the sides
of new evaporator. Dress wiring.
19. Evacuate and charge the system. Use original
factory charge quantity of R-134a. (See
Evacuation and Charging Procedure
20. Replace all component parts in the freezer.
21. Reinstall the rear access cover.
.)