You need to replace the blower motor resistor. It is a circuit that uses different resistors for different speeds. They routinely burn out....
Any Chrysler dealer can provide you with specifics on their lifetime power-train warranty.
If it is a 2.7l engine it is a good four hours, and that is on a good day
Brake calibers can be rebuilt, but my advice is to just replace it with a new one. Be aware that if one is sticking then more than likely your brake fluid has become contaminate with moisture. I would replace both calibers and not just one. Remove all the old brake fluid and install fresh fluid from an unopened can.