As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB TEMPERATURE CONTROLLER IN FULL COLD CONT. CABIN DUCT TEMP READS 44C AND INCREASINGLY STEADILY FLIGHT DECK TEMP UNABLE TO CONTROL. GROUNDED - YES. FOLLOWED FIM PACK TEMP CONTROL - BITE B737-900 FIM 21 62 TASK 801 FOUND FLT DECK SELECTOR FAULT - FOLLOWED FIM 21-62 TASK 805 - REMOVED AND REPLACED TEMP CONTROL MODULE IN REFERENCE WITH B737-900 AMM TASK 21-61-15-000-801, OPS TEST GOOD.