Evaporator Core: Testing and Inspection

A faulty evaporator will provide insufficient cooling. The core may be restricted with dirt, the case may be cracked, or a seal may be leaking. If evaporator restriction is due to icing, the expansion valve, capillary tube or suction throttling valve, if equipped, may be at fault.

Because of constant condensation of atmospheric moisture on evaporator coils, ensure that the draining system is unobstructed and clean.