No air flow.... Randomly

[Colin]

Howdy,

2002 Jeep liberty 3.7L

Right now the heat(temperature and air from the blower) is coming out perfectly. I drove 4 hours to my buddies place and it was the Caribbean. I left there for the 4 hour drive home and 20 mins into my drive no air coming out of the vents. The heat will eventually trickle out the dash but not out the vents with any force what so ever. Fan sounds like its blowing as hard as it can but nothing coming out of any of the vents/window/floor.

I have searched and found that their isn't an cabin air filter. Checked the air recirculater screen isn't blocked.

Suggestions? I am about to head out for another 4 hour drive and will need heat.

 

[pontipine]

Try recirculate for a few minutes , it might recover. Mine has this same problem. I have the most trouble on anything with floor airflow. Only happens when it's been running for a while.
You might find that it's more reliable on straight defrost (no floor).