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thom4782 · 07-04-2016, 02:53 PM

Best guess poor airflow over the evaporator. When this happens, ice can build up and restrict airflow out of the vents. After the ice melts, the airflow and cooling works once again, How long since you popped in a new air filter up by the expansion valve. When you pull it out, check to see if you can see anything else obstructing the airflow. The other possibility is that the ac system isn't properly charged. IIRC, normal vent outlet temperature is more like 40 to 45 degrees. It the evaporator gets too cold, it may also experience icing.

07-04-2016, 02:53 PM	#2
thom4782 Registered User Join Date: Sep 2010 Location: Foster City CA Posts: 1,099	Best guess poor airflow over the evaporator. When this happens, ice can build up and restrict airflow out of the vents. After the ice melts, the airflow and cooling works once again, How long since you popped in a new air filter up by the expansion valve. When you pull it out, check to see if you can see anything else obstructing the airflow. The other possibility is that the ac system isn't properly charged. IIRC, normal vent outlet temperature is more like 40 to 45 degrees. It the evaporator gets too cold, it may also experience icing. Last edited by thom4782; 07-04-2016 at 07:00 PM.