Checking the heater core

Remove the air conditioning unit.

Remove the heater core of the air conditioning unit.

Check for cracks, damage and coolant leakage.

If any faults are found, replace the heater core.

Check the plates for deformation.

To eliminate deformation, use a flat head screwdriver.

Check that the heater core inlet and outlet pipes are not damaged.

If necessary, correct the deformation with pliers.