Quote:
Originally Posted by tcbracing
Just to put some facts with all of the statements out there, here is a photo of my fogging. This was a typical morning in Missouri this summer - 78 degrees, 100% Humidity, dewpoint around 74 - Auto Climate set to 72 degrees. It never gets any worse than this no matter the time and/or temperature and, based on my seating position (I'm 6'3"), it does not block anything except some of the hood. Had the exact same issue on my 2013 Cruze and 2014 Cadillac CTS and have the exact same issue on my fiance's 2011 F150...
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I think his point is that if the dealer is replacing parts - the technician (dealer) has diagnosed a problem with the vehicle. Otherwise, why would they be replacing the parts?
Either the mode valve actuator is not fully moving the door closed or the door is binding which is not allowing the door to fully close. Scan tool would confirm this. The technician also presumably monitored upper duct air temp with the scan tool to verify the cold(er) air is reaching this ductwork to verify the diagnosis of the complaint. It is assumed the technician monitored the HVAC control module and possibly saw the sensor signal is not changing or the mode valve actuator has not moved to the commanded position.
This is either a hardware fault or software issue with the controller in the automatic operation mode.