As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA - FLT 6535 - JUST AFTER TAKEOFF, LEFT AIR CONDITIONING WENT TO FULL HOT. THE FLIGHT ATTENDANT SAID IT WAS UNBEARABLE FOR THE PASSENGERS. THE CREW RETURNED TO LGA WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT AIR CYCLE MACHINE IAW THE SAAB MM. AIRCRAFT RETURNED TO SERVICE. (X)