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sprinkles08, ASE Certified Technician
Category: Lexus
Satisfied Customers: 22803
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Lexus SC430: how do you know if you need to replace the air

Customer Question

how do you know if you need to replace the air door actuator or the evaporator coil in lexus 2003 sc430?
Submitted: 2 years ago.
Category: Lexus
Expert:  sprinkles08 replied 2 years ago.
Hello and welcome to JustAnswer!
A failed actuator on the heater box will usually cause a complete loss of whatever door it controls. The blend door actuator would prevent you from controlling temperature, mode door would prevent you from changing modes.
An evaporator would need to be replaced if it is leaking refrigerant. Once in a great while in an extremely uncommon case an evaporator can leak internally and cause a temperature difference between sides.
What symptoms are you having?