As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN TEMP LIGHT ON RECALL, WENT OUT. ACFT GROUNDED. TEMP CONTROLLER LOGGED CONTROL CABIN TCV FAULT. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE PROCEDURES PER B737-800 AMM TASK 21-61-00-700-806-002 AND RESET FAULT, BOTH TEMP CONTROLLERS BITE TEST GROUND VERIFICATION TEST OPS CHECKED GOOD. NO EXISTING FAULT.