As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ILLUMINATED DURING CLIMB FOLLOWED QRH. AFTER 10+ MINUTES WAITING FOR DUCT TO COOL, STILL UNABLE TO RESET ZONE TEMP LIGHT. SUPPLY DUCT TEMPERATURE APPEARS NORMAL. GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE PROCEDURES PER B737-800 AMM 21-61-00-700-806-002. BITE TEST IS GOOD ON BOTH CONTROLLERS. OPS CHECK GOOD. NO HISTORY PAST 30 DAYS.