Find Aftermarket Heat & AC Parts for the Sterling L-Series. Keep your cab comfy year-round with our Sterling L-Series heat and AC parts. From evaporators and hoses to heater cores, we've got everything you need to upgrade or replace your climate control system. Built tough with features like nylon fiber reinforcement, these parts handle the demands of the road. Shop now for reliable solutions and fast shipping to get your rig back on the road in no time.