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A/C TROUBLE CODE 900 1997

uid 11021's pic
posted by  dewfpo on  Wed Mar 19 10:47 CST 2008
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last visit: Thu Oct 23 18:34 CST 2014
[RELATED]

Andy,

The dual operating vacuum bellows that the tech is referring to is the Floor/Dash vent (Blue/Yellow vacuum lines). If it is malfunctioning, it WILL NOT set a code in the HVAC system (blue flashing snowflake). You will loose air coming out of the dash vents on medium & up acceleration. But a bad sensor may, such as the passenger's side Sunlight sensor. When the sun light sensor, senses direct sunlight, the AUTO A/C function is supposed to provide more airflow/AC to the upper dash area (dash vents and maybe even the defrost vents). That's all it does.

DEWFPO
--
1998 S90 077,400 and 1995 964 154,100






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