The evaporator is also called a cooling unit which job is to release cool air in the car cabin. Simply put, an evaporator works much like a refrigerator. In a car air conditioning system, the evaporator acts as a medium for accommodating freon that has changed shape to mist or cold vapor.
What happens when an evaporator core goes bad?
A faulty A/C evaporator can show symptoms like hot air from A/C vents, inconsistent air temperature, or an A/C compressor that won't turn on. The A/C evaporator is responsible for assisting the refrigerant as it absorbs heat from the surrounding air.
troubleshooting:
The most common problems with car air conditioner evaporators are:Perforation due to corrosion
Fins clogged with mud or clogged with frost
Coupling leakage