My 2000 Jeep Cherokee AC controls will adjust the blower from low to high and you can hear the blower ramp up and down but there is little volumne of air coming out of the duct, air is cold but not enough air flow to cool cherokee
Check your resister pack, if the air is still cold then the freon is
being moved by your compressor and passing through your orfice tube
fine so there is the right amount. DO NOT open the system unless you
have to, each time it is open they sugggest a dryer/reciecver
replacement. The resister pack is a small block about the size of a
palm of a hand. It contians a set of coils which conduct
electricity at different rates based on that rate <the amount of
voltage> your a/c fan will blow that speed. For example high= no
resistance, low= 3 reiester if you have 4 settings
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in all modes, even moving real fast in fresh air mode
no vent blow? weak in hot mode and cold?????????????????
no year stated,so answer will be kinda(weak,)
(weak and. tragically generic, is that good?, no)
see? this is 2016, so.....
lots of EVOLUTION to the EXTREME here.
for sure the climate control option.?
like Gemini 1 to Space X?
weak blower, the filter is dirty:?
hvac self tests fail? (read hvac page in FSM see it?) ask.
12vdc to blower pins, on high?
yes, then blower is weak(means bad)
or there are restrictions, then
top restrictions are dampers stuck
controls to dampers MALF'ING.
or dead mice nests,
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
you may have had something fall down into the defrost vent and it has worked its way down and is blocking the air flow thats trying to come out the vents,near the blower motor.also does it sound like the blower motor is spinning on high speed or at a lower speed,you could have a slow turning blower motor.
over pressure or high pressure in system will cause high pressure cutoff switch to go open,also poor air flow across condenser could add to the problem. When the A\C stops getting cold is the compressor still engaged and running.
You most likely have a problem with a part called the air temperature control blend door, it controls the air flow across the AC core or heater core, it is most likely warped or the motor that operates it is defective or in most cases both are in need of replacing. This repair requires the entire dash be removed to access the AC parts.
The blower problem on your jeep needs proper diagnosis. This could be one of several problems. As simple as a relay or as big as a blower motor. With automatic temperature control you could be looking at a control assembly.
the cold air on the passenger side is a passenger blend door problem. Could be the actuator or a broken door. This problem requires removal of the entire dash to get to the problem. Not something you want to tackle without a complete step by step set of instructions.
I do have one other suggestion for this problem. You will still have to get the blower problem to complete the repair. Copy this link and go see what you think about blend door repair.
It's possible you are not getting enough coolant flow to your heater core. Try pulling the hoses off the core, blowing it out with air compressor, fill with water and blow out again. Try this about five times and see what happens. Alot of times these cores will plug up or have restricted flow. They will blow warm at low speed but it won't flow enough hot coolant through to stay hot on high blower speed.