COMPONENTS OF THE AIR CONDITIONING Troubleshooting Evaporator


COMPONENTS OF THE
AIR CONDITIONING
Troubleshooting
Evaporator


Evaporator auto


Evaporator:
Evaporator

The evaporator is used to exchange heat between the ambient air and the refrigerant in the air conditioning system.
 
How they work

The expansion valve and/or orifice tube injects the highly pressurized liquid refrigerant into the evaporator. The refrigerant expands. The resulting evaporation cold is discharged to the environment via the large surface of the evaporator and routed to the vehicle interior through the ventilation  airflow.


Effects of failure
A defective evaporator exhibits the following symptoms:
*    Poor cooling performance
*    Failure of the air conditioning system
*    Poor ventilation performance

Causes for failure of the evaporator can be:
*    Pipes blocked in the evaporator
*    Evaporator leaking (at the connection, caused by damage)
*    Evaporator contaminated (air passage disturbed)

Troubleshooting
The following test steps should be considered during troubleshooting:
*    Check evaporator for contamination
*    Inspect evaporator for damage
*    Check connection pipes for correct fit
*    Leak test
*    Pressure measurement with the compressor switched on and the engine running
*    Temperature measurement on the input and output line
             
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