No air from the front-vents when engine is hot – Pontiac Trans Sport/Montana MiniVan

[EricTheCarGuy]

Defrost is the default setting for most systems when there’s a problem.

Topic

[Meridivs]

I have opened the covers and looked under the dash – this is a vacuum-operated system – but all vacuum solenoids appear to be working when I push the A/C, VNT or HTR buttons but no air comes from the front vents on A/C or VNT mode. Fan works ok._x000D_
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Anythi

[sam priem]

have you checks the actuators that switch vent outlets (from windshield blowing to front blowing to floor blowing)?

[EricTheCarGuy]

Normally there’s an accumulator that stores vacuum to keep a constant source for the system.

[Author]

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