As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 695 BOS-PUJ, AIR RETURN TO BOS DUE TO CABIN TEMP UNCONTROLLABLE ON CLIMBOUT. THE COCKPIT AND CABIN TEMPERATURES WERE 90 DEGREES AND RISING. TECHNICIAN FOUND PACK CONTROLLER FAULTED. REMOVED AND REPLACED PACK NR 1 CONTROLLER AND TEMP SENSOR. PACK TEMP CONTROL CHECK GOOD IAW 21-20-00.