Low airflow out of vents - 2004 Jeep Grand Cherokee

topic cars and HVAC heat lost.
the heater blower resistor is bad.
or controls to it bad.
the vent problem is bad vent actuators or controls to them.
see hvac here

https://eautorepair.net/Marketing/Default.asp

The duct may have come loose under the dash on that side.

Could also be clogged cabin air filter. Could have a blockage in the ducting, too.

If the air flow cannot be controlled from vent/defrost/floor you may have a blend door issue. This is an electric motor that operates a door in the heating system to control airflow. There are usually 3 motors controlling airflow direction,heat and recirculation. The Ac not blowing cold may also be another problem. If the AC is operational, the compressor will be engaged and the Ac low pressure line under the hood will bw cold. If this is all ok then a blend door issue should be suspected

Probably needs a recharge easy to check go to auto store get a kit hook it up turn on a/c full check gage and charge to level

it look like a/c evaporator is freeze. look for a/c clutch cycling switch

hope it helps

check location of a/c condenser it sounds like it is freezing up and is probably located under glove box. also check drain hose for a/c condenser that it is allowing excess water to escape from a/c condenser box

theres a small narrow plastic line from engine compartment going through fire wall witch supplies the actuators it gets hard over time and breaks or cracks when that happens the defrost vent will stay on . when this happens not enough air vauum getting to vent units.

probably the vent in front of the blower motor lose, check that first.