Hello,
Just wondering if anyone has any input on how to effectively clean the under-dash air conditioning evaporator (not the condenser) on a 1999 SC 300 without disassembling the HVAC housing?

When looking into the HVAC ducting with the cabin air filter access door removed and using a flashlight and mirror, the evaporator's finned core looks like it has significant cigarette ash or other contaminants embedded in its air inlet. My car did not have a cabin air filter in it when I purchased it.

Thanks.

 

You want the Toyota AC refresher kit
Available from any Toyota or Lexus dealership, or you can order it.

Part Number: 00289ACRKT
Supersession(s): 00289-ACRKT; 289ACRKT

1. Designed to remove objectionable odors from the vehicle’s air conditioning system.
   • Genuine Toyota Power Foam Evaporator Cleaner and Refresher (Step 1).
   • Genuine Toyota Condition Air Automotive Ventilation System Refresher (Step 2).
2. 2-part kit.
3. Aerosol deodorizer for air intake vents.
4. Freshens air conditioning intake and evaporator core.
5. Expanding foam evaporator core cleaner and refresher.

https://parts.toyota.com/p/Toyota-AC...0289ACRKT.html

The previous owner of my IS300 smoked cigars in a tropical climate and no matter what I did, turning on the AC would make the car smell like cigars. The expanding cleaning foam works so well I didn't even need to use the spray deodorizer.

The hose sprays the expanding foam up the evaporator drain tube and it floods the evap core