try Lubeguard Kool -It Evaporator & Heater Core Foam Cleaner
BENEFITS:
Eliminates Odors
Maximizes cooling system efficiency
Reduces Allergens and Contaminants
Improves Air Quality
Leaves a Clean, Fresh Scent
Ideal for cars, trucks, vans & RV's.
Directions For Professional Use:
Locate the evaporator/ heater unit, and access holes, drain plugs and/or drain tube. Access can often be made through blower motor, fan speed control, or other location depending upon vehicle make. Insert application wand through opening. SHAKE CAN WELL. Attach applicator wand to can, then depress cap firmly to lock and activate the full contents of the can into the assembly. Allow KOOL-IT's super foam fighting to work, approximately 15 minutes, then switch fan on lowest setting for 5 minutes. Foam will condense and remove contaminants as it flows through the drain hole. The air conditioning and heating system is now fully operational.