Stratus V6-2.5L VIN H (1997)
Evaporator Core: Technical Service Bulletins
A/C , Heater - Odors/Defroster Will Not Clear Glass
GROUP: Heater & A/C
DATE: Sep. 27, 1996
A/C Evaporator Odor
Defrost In "Recirc" Mode
1995 - 1997 (PL) Neon
1995 - 1997 (JA) Stratus/Cirrus/Breeze
1996 - 1997 (JX) Sebring Convertible
A temporary musty odor may be emitted from the A/C ducts and/or the defroster may not be able to completely clear all the glass, when the recirculation
mode (Recirc) is used for extended periods of time.
The vehicles listed above offer a separate rotary knob for independent control of the Fresh (outside air) / "Recirc" (inside air) function. The intent of the
independent control of Recirc is:
To temporarily allow customers to eliminate dust or outside odors.
To get maximum cooldown performance by going into "Recirc" without having to change modes or temperature settings.
Prior to January 1995, the A/C evaporator had a chromate coating for long term corrosion protection and a silicate coating to insure that condensate
would run off the fins instead of getting in the airstream and coming out the panel outlets. Due to new regulations, a new non-chromate coating process
was implemented in January 1995.
Under some ambient conditions the new coating may cause the air passing over the evaporator to develop a temporary musty odor. When operated in the
"Recirc mode the odor is more noticeable. Also, operating for extended periods in "Recirc" with the A/C off may create and intensify the musty odor.
Running in "Recirc" for long periods of time in very cold weather may cause moisture from snow tracked into the car and moisture from the occupants
breath to condense on the cold glass and in some cases the defroster may not clear all the glass. Even with the A/C running on mild wet days and running
in "Recirc" some fog may remain on areas of the glass.
CHANGES IN THE 1997 NEON WILL NOT ALLOW THE FRESH/RECIRC DOOR TO STAY IN RECIRC WHEN THE DEFROST MODE IS
It is important that the instructions given in the owners manual that recommend that the "Recirc" mode be used for no more than 30 minutes at a time be
followed. Encourage customers to operate in Fresh as the normal condition and go to Recirc only for the temporary conditions given above.
POLICY: Information only