I have a 2000 f150 for my work truck. The ac blows cold, but the air flow is very weak. Switch from regular ac to max ac and you can hear it trying to blow harder, but air flow is still weak. Air flow on max or regular is same. Heat, defrost all work. Where do I start looking? Thanks.

 

Pull the blower motor and inspect the evaporator core for buildup of dust or critter nests that would restrict airflow.

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just finished that, a chore too. everything looked fine. still have same issue.

 

Whoa. Did you pull the dash to look at the evaporator core? I'm having the same issue. Even replaced the blower motor, and it didn't help. Heard you have to pull the dash in order to get to the evap core.