I have a 2005 Chrysler Pacifica. While driving I heard a faint sound almost like a pop. Then steam coming from the front drivers wheel well. Then I noticed the heater will only blow cold air. Can you please tell me what happen ?

its located near the battery , generally inside front bumper driver side

check tires --have rebalanced ,make sure proper air pressure ,also check brakes --then check front suspension tie rods /balljoints control arms c/v axles

could be a few things.....you either need whats called a "high speed balance" any tire place can do it for a few dollars, OR one of the belts has "slipped" in one or more of your tires. Is it coming from the front or rear? if its the front, you will usually "feel it" in the steering wheel......if its the rear you will just feel it while driving

sounds like fuel filter or screen on fuel pump plugged

I have a 2004 Pacifica and mine is on the drivers side front, underneath between the bumper and the wheel splash guard. You will need to remove the splash guard ti access the PCM. Not very hard at all. Replacement time for a handy DIYer: about 1/2 hour. Good luck!!

drivers side under the motor or out by the axel
if under the motor is it a frint wheel drive auto if so the seal ware the axle goes in is bad if is not a front wheel auto check the power steering box to see if the oil is leaking from there if so replace the box
all these parts can be gotten at autozone

It sounds like a wheel bearing. Depending on the miles it is possible it could be under warranty.

Take an look behind you front wheels,turn in your wheel,and turn off the car,there rubber boots that cover your CV joints,if they are crack,you will see grease/oil.when the cv joints go bad thats the sound your hearing.

it is called a clockspring.
the other thing to check is that the rear part of the steering wheel is clearing the column shroud properly.
call a few places in your area and how much it is to change the clockspring.

Not on front wheel drive unless your hands are no bigger than an infants hands