Front Heater/AC doesn't work on any setting, Rear works fine.

Hello, the front "main" heating and air conditioning system is separately operated from the auxiliary or "rear" system. As a result, it's possible to have the rear working while the front is not, as you are experiencing. It does sound like you are experiencing first and foremost a blower control problem in the main system. This can be caused by a faulty blower motor, wiring concern to the blower motor, blower motor resistor, relay, fuse or main controller. Hands on testing is needed, but it shouldn't be too difficult for an experienced technician with proper test equipment and workshop manual resources to figure out what is going on with your vehicle. Good for you - yes, don't be a "parts changer". No "educated guessing" is worth it. You simply won't know until an inspection and some troubleshooting is performed. Not even here in this forum can we guess well enough to direct you to get the "right" part. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops