2000 jeep grand cherokee, only blow out a little air even when the blower on hi,,you have to put your hand next to the vent to feel the air

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)
1993?
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
or
controls to dampers MALF'ING.
or dead mice nests,

TELL MORE GET MORE.?

Is the blower running at full speed? Did you check the blower motor resistor?

check your blower hoses to see if one or more have come loose or got redirected or the selector switch isn't functioning properly (is it blowing better on defrost as opposed to floor vents, or forward vents, etc.)
Good luck

possibly some other part affecting the blend door if you feel ac air or no heat

not at all. That its a different problem you have. blower motor or vents in general, and gas pump have nothing in comun.

The same just happened with my 2000 Jeep Wrangler yesterday. I'm curious as to what the answer is. I checked all my fuses and it's not that. Can still feel clicking when I turn my switch so I doubt that's the problem.

The blower motor resister shorted out common problem. It is located behind the glove box on the HVAC assembly.

this sounds like the recirculation door in the heater box is broken and this is a difficult and can be an expensive repair as the dash has to be removed for access. a quick check for this is if you release the glove box and let it hang you will see the heater box if you reach up to the left top you will feel a grid and the recirc flap is housed there you can operate the blower and hot and cold and see if flap moves

Pretty sure I have answered this about a million times. Blower motor is on engine side of firewall on passenger side. You can run a hot lead to it to check if it's working! You did check fuse... Right?

can you hear the fan working on all speeds?