Ford Ranger Control Panel Replace/Remove

Heater Blower Works Only On High Speed. Where Is The Resistor In This System Located And How Do I Replace It?

My Heater Is Stuck In Defrost It Will Not Change To Vents Or The Floor. It Does Change To A/c And It Blows Out Cold Air What Could It Be?...

The Heat And Air Will Only Work When The Knob Is Set To Full Blast. Does The Whole Knob Control Panel Need To Be Replaced?

I Could Really Use Some Help With This (i Have Factory Air). I Was Cruising Along On A Cold Day With The Heater Blowing Out Plenty Of Heat...