Blower does not work on 2000 grand cherokee jeep

Replace it, the brushes in the motor are worn out.

head unit may be bad

You mean the fan is not working...?
if so check fuse.

Mai Lor

sounds like either the blower is going out or you have a low voltage with you car

Take the blower motor out, power it and if it works then change the blower motor resistor. If the motor dosent work when powered then change the motor.

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.

sounds like system is low on freon,? safety switch turns system off when too low on freon to prevent burning itself (the compressor) up...

Check the thermastat or your cooling fan to make sure all is working good. If your engine cant warm up, you will not produce any heat inside the car

Blower motor resistors are found on the pasenger side ducts near the blower motor. It should have three wires going to it.

You have to change the resistor (little box that the blower wires goes to) it is held in with 2 screws you will need the harness (($15) as the factory one was a defect and last you need to change the blower motor as the factory one draws too much power and burns up the resistor and harness..this is what i did on a 2000 grand cherokee with the climate control and it works great..I tried to fix the harness etc but it will still go out again if you do the above you will not have any problem with the blower working at random it will work better than new.I think jeep has retards for electrical people, has anyone had problems with the junky taillight assembly??