sounds like blower motor resistor. they are about $30.00 from the dealer
1st or 2nd from the left
If the position #5 (high) blower is not working, it is the small resisitor assembly on the blower motor housing under the passenger side dash. Very easy to replace.
It could be a blown fuse but more likely it is either the blower motor resistor or the blower switch itself. TJ's are prone to overheating and melting blower motor switches because of high current flowing through them. To test the switch, check all four fan speeds to determine which of them is inoperable. The blower motor resistor regulates the blower speed on positions 1 through 3. If the blower doesn't work on any position 1 through 3 but it works on full speed (Position 4), the blower motor resistor is bad and needs to be replaced. If the blower doesn't operate at full speed (position 4) the blower motor swithch is bad and you need to replace switch assembly, After that, check the lower fan speeds to make sure they work. If any of them doesn't work, replace the blower motor resistor also.
my infinity g-20 blower not working
If by quit working you mean quit blowing, the things to troubleshoot are the blower motor, the blower motor resistor switch, or the blower motor speed selector switch. If by quit working you mean it only blows cold or warm air, the thermostat is probably stuck in the open position.
Check resistor pack on blower motor
crown Victoria blower not working and head lights.
gants, I have Denali 2004, the rear AC blower not working
Blown fuse. Burned out blower speed resistor. Faulty blower switch. Bad blower motor.
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The blower in my 2001 Honda Civic did not stop working.
replace the blower fan resistor located under the dash behind the glove box