A/c question?

[Josebd]

It works perfect,but whenever i Turn off the pickup to say go in a store,then get back in it,it takes 5-7 seconds before it starts blowing air! Is this normal?any other vehicle as soon as you start it starts blowing air

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[VegasRanger]

Normal. Mine does the same thing.

 

[Jason B]

This is normal. I think its because the AC is or can be controlled thru Sync, and that takes a few seconds to boot up. Remember, everything is controlled thru the ECM, BCM, PCM - all electronically. Not directly as older vehicles did. Even the window and door locks are controlled by the BCM. You push a button, that sends a signal to the BCM, the the BCM performs whatever function you requested.
I have my truck on a scheduled startup. When I get it the truck, the engine is running with the AC on. But when I insert and turn the key, the AC goes off for a couple of seconds until the system boots.

 

[Rp930]

Some systems cool the evaporator a few seconds before turning the fan on to keep it from blowing hot moist air when it turns on. Quicker cooling.

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