As usual, Ryder took excellent care of me, even though I descended upon him with. As usual, Ryder took excellent care of me, even though I descended upon him with a sporadically non-functioning AC and no appointment. He and the tech quickly diagnosed the problem as a malfunctioning switch - the tech even took the switch out of his own car and put it In mine to confirm that it was just the switch and not some larger problem with the AC system.