Can you explain my Chevy truck's ventilation controls?

Asked by elbanditoroso (33157

) April 16th, 2015

Chevrolet Silverado – low end.

Situation:
-> AC button is OFF
-> Ventilation button is pointing to face and feet (in other words, NOT defroster or and not to window)

When the Recirc button is pressed, I get
a) more air being circulated
b) but it seems cooled/refrigerated

When the recirc button is not pressed, I get
a) less air coming through the fan
b) ‘normal’ ambient air temperature, doesn’t appear to be cooled

Is the recirculated air being cooled by the AC even though the ACbutton is off? Or is the air being cooled by the fan/radiator without the need for additional refrigeration, and it just feels cooler to me?

car ventilation

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2 Answers

Sounds like the inlet may be clogged with leaves or other debris. The air vent for the A/C and heater is just in front of the windshield. The cooler air you get when recirculation is “off” is because the heater/A/C unit that is under the dash is cooler than the area in front of the windshield, where you get the warmer fresh air (possibly partially heated by engine heat or sun on hood) when recirculation button is “off.”.

kritiper (25757

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