During the last 26 months, I've experienced seven occurrences of a short period of warm air blowing, but the problem has resolved itself in two minutes or less every time. Using driving logs from Teslafi for each event, I was able to show the cabin air temperature rising and falling. Tesla service responded saying that each event occurred as the car accelerated thru 55 mph, which triggered the air suspension to drop to the lower setting. Their solution was to charge $450 for an "air suspension compressor overlay" -- which sounds like some form of electromagnetic shielding. I intend to protest that a design deficiency should be covered by the mfr, not the customer. So how widespread is this problem?