Yep as stated. And you'd be surprised what gets up into the blower housing.
Rodents love that spot to build their nests. I've pulled mice, rats, chipmunks, squirrels, even a snake out of em. And sometimes it isn't pretty as said animal get's nailed by the fan.
Pop the battery out and there's the bolts for the blower motor. Pull the motor and while it's out, take a flashlight and take a peek inside the housing for any foreign objects.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.