B737-800
Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 21000
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
During climb out (low 20;000s) received call from cabin that the temperature in cabin was very hot and getting worse. Was not able to control heat from air-conditioning pack; returned to [departure airport]; landed overweight but uneventfully.Was told by mechanics there was an air cycle machine failure.
[Report narrative contained no additional information.]
B737-800 flight crew reported returning to the departure airport after they experienced an air cycle machine failure that resulted in high cabin temperatures.