A/C weak on max.

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Apr 27, 2012 | 10:04 PM

john griffin

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From: South-East Tx.

A/C weak on max.

OK, when I have the A/C on fresh it blows good, but on Max you can hear the blower, but weak out vents. Where would the diverter door be. On a 1999 f-250.

Apr 27, 2012 | 10:49 PM

critterf1

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From: Newport, N.C.

Check the floor/intake area for an obstruction first.

Apr 28, 2012 | 06:50 AM

projectSHO89

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From: St Louis

Yep. The door is up behind the glovebox. Sounds like it might have sucked in a plastic wrapper or bag.

Apr 28, 2012 | 08:57 AM

john griffin

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From: South-East Tx.

Hey thanks for the ideas, I have looked behind the glove box, and I see one vacum lever that moves, I'll check for a bag.

Jun 10, 2012 | 03:16 PM

woodstockaz

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Any updates on this?

I have same issue, but no clogs or bags obstructing intake.

On normal A/C it seems to blow fine, but when switched to max A/C, the airflow decreases slightly but you can hear the blower working harder.