This is only a myth about not turning on the air conditioner at highway speeds. Kung totoo kasi ito hindi ka na puwedeng magbukas ng a/c sa highway. And we know that isn't true. Otherwise, lahat ng makita natin sa highway pinagpapawisan na dahil walang a/c. The timing was pure coincidence lang. Marahil talagang may problema na ang compressor beforehand. They are right, the compressor was designed and engineered to handle those high RPMs.

I will advice to bring your car to competent a/c repair shop.