GM 89018834
Evaporator Core

The process begins with HVAC module assembly removal followed by screw uninstallation which allows for separating the HVAC module assembly halves and the subsequent assembly split. You should remove the evaporator core before proceeding to its HVAC module assembly. Proper operation of the new evaporator core depends on the addition of refrigerant oil. Attach the seal between HVAC module assembly halves before inserting the evaporator core inside the assembly to rebuild the system. After screw installation to connect both HVAC module assembly parts use 1.9 N.m (17 lb in) torque before reattaching the HVAC module assembly.

The HVAC module assembly must be removed as the first step to replace the air conditioning evaporator core. Split the HVAC module assembly halves by unscrewing its pieces followed by removing the evaporator temperature sensor control module screw before relocating the sensor module. The HVAC module assembly should be disassembled (1, 4) to enable the removal of the evaporator temperature sensor that connects to the evaporator. To complete the procedure remove the evaporator core from its position in the HVAC module assembly. New evaporator core installations require refrigerant oil according to the specified system capacity information provided in the refrigerant system specifications. The HVAC module assembly halves need their seal installed before inserting the evaporator core into the assembly and attaching the evaporator temperature sensor to the core. Install two screws to unite the HVAC module assembly parts (1, 4) while applying torque of 1.9 Nm (17 lb in) for tightening. Finish the evaporator temperature sensor control module screw installation process by both securing it and tightening it to 1.9 Nm (17 lb in). Reinstall the HVAC module assembly afterwards.

You should start the evaporator core replacement by taking out the HVAC module assembly but watch out for screws concealed under foam insulation. Secondly you need to remove the screws before splitting the HVAC module assembly in two parts which leads to the separation of the HVAC module assembly (1, 4). The HVAC module assembly requires removal of its evaporator core next. The addition of refrigerant oil to the new evaporator core remains crucial during its installation process. The evaporator core installation starts with inserting it into the HVAC module assembly followed by the HVAC module assembly (1, 4) assembly process. Position the screws to unite both HVAC module assembly halves before securing them at 1.9 N.m (17 lb in torque). Therefore install the complete HVAC module assembly.

The first step to replace the air conditioning evaporator core is to remove the HVAC module assembly. Through screw removal process the HVAC module assembly parts can be split apart. Then proceed to remove and reinstall the evaporator temperature sensor control module screw. The first step is to divide the HVAC module assembly into two parts (1, 4) while extracting the evaporator temperature sensor from its position on the evaporator. The second step involves removing the evaporator core which is located inside the HVAC module assembly. Implement proper oil addition to the new evaporator core during installation as per the refrigerant system capacity requirements. The evaporator core installation requires insertion into the assembly followed by attachment of the evaporator temperature sensor to the core. Seal the HVAC module assembly halves before placement. Rebuild the HVAC module assembly while keeping to the fastener notice and use screws to join half sections by tightening each screw to 1.9 N.m (17 lb in). Finish by screwing and tightening the evaporator temperature sensor control module to 1.9 N.m (17 lb in) while putting the assembly back into place.

Install the evaporator temperature sensor control module screw, also tightening it to 1.9 N.m (17 lb in), and reinstall the HVAC module assembly.

First, remove the HVAC module assembly and the screws to separate the HVAC module assembly halves.

Ensure to add refrigerant oil to it, following the refrigerant system capacities for system capacity information.