When you call (678) 314-4543, Chris picks up. He asks what the unit is doing, what you've already checked and how urgent it is, and he tells you what to do in the meantime.
On site he finds the fault and explains it in plain words: what failed, why, what it takes to fix it and whether the unit is worth fixing. Then he fixes what's broken. If the repair is simple, he says so. If the equipment is at the end of its life, he says that too, and the decision is yours.
There is no second technician, no dispatcher and no sales visit. The person you talked to on the phone is the person in your kitchen, and the person you'll talk to the next time.