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Inconsistent climate control

 
Old 03-17-2018, 05:42 PM
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VFRMike
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Default Inconsistent climate control

My climate control seems to have varying interpretations of what 72 degrees should feel like. Most of the time I just set my climate control to “Auto” at 72*, and usually that’s comfortable. Lately the car occasionally decides to pump out really cold air at 72* and I have to bump it up to 74 or 75 to keep the desired level of comfort. The ambient temperature display appears accurate, and I can get heat when needed. The symptom is more likely to occur after a re-start VS a cold-start, and most often at ambient temperatures below the mid-70s.
My mediocre ‘search’ skills did not turn up anything on the topic, has anyone else run into this?
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Old 03-17-2018, 06:42 PM
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Porschetech3
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Test for faults using Durametric (or PIWIS). Also do a search for "climate control hack", there are about 32 different values you can display on the climate control for various temps, door activation, sensors ect.
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Old 03-17-2018, 08:50 PM
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fpb111
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If the car has been sitting in the sun, especially the right side of the dash, it will pump cold air until it gets down to 72 at the temp sensor.

could also be failing temp sensor or temp sensor fan motor?

99-05 PORSCHE 911 996 RIGHT INTERIOR AMBIENT TEMPERATURE SENSOR OEM 99665324100

https://workshop-manuals.com/porsche...res/page_2858/

http://www.design911.com/Cabin-Tempe...96/prod136205/

https://www.ebay.com/i/253452196947?...D1470099914221

Last edited by fpb111; 03-17-2018 at 09:07 PM. Reason: Add url
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Old 03-18-2018, 10:29 AM
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DBJoe996
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Make sure your outside air temperature sensor is plugged into the bracket in the front bumper and not hanging down or pushed through the bumper. The climate control system uses both outside and inside temperature sensors to operate.
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