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CONTAMINATED R134a SEALED SYSTEM REPAIRS
NOTE: Always replace the filter - drier during ANY repair on R134a sealed system.
COMPRESSOR BURN OUT
1. Purge refrigerant from the system.
2. Flush the system
3. Replace the filter-drier.
4. Replace the compressor.
5. Leak check, sweep and recharge the system.
RESTRICTION IN THE SYSTEM
1. Purge refrigerant from the system.
2. Determine location of restriction and repair if possible.
3. Flush the system.
4. Replace the filter-drier.
5. Replace the compressor if required.
6. Leak check, sweep and recharge the system.
FREEZER COMPARTMENT
The freezer compartment comprises of the following parts:
1. Evaporator (Tube and Fin type)
2. Evaporator fan motor which is mounted on the evaporator cover assy.
3. Defrost heater
4. Bi-metal switch
5. Evaporator cover assembly.
6. Quick freezer shelf and cover.
7. Ice tray
Now let us see the replacement procedure for the above-mentioned parts. For any part
replacement in the freezer compartment first remove the part mentioned above of S.No. 5
to 7.
Replacing The Bimetal
The bimetal is clipped to a small section of the evaporator inlet tube that has a coating on it.
This coating prevents "galvanic action" from occurring between the dissimilar metals of the
bimetal clip and the evaporator tubing, and thus, burning a hole in the tubing. When you
install the new bimetal clip, make sure to install in the same location as the old one.
1 Remove the evaporator cover and remove wires from mounting clip located on evaporator
cover.
2. Unclip the bimetal from the evaporator inlet tubing and unplug it from the wiring harness
connector.
3. Plug the connector of the new bimetal into the wiring harness.
4. Locate the evaporator inlet tube and clip the bimetal over it.
5. Now proceed remounting the evaporator cover.
Replacing The Defrost Heater
1. Remove the evaporator cover and wire clips.
2. Unplug the defrost heater connector from the wiring harness.
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