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 ON RECALL. EXTINGUISHES ON RECALL. EXTINGUISHES WITH RESET. GROUNDED - YES. SYSTEM HAD A CONTROL CABIN SENSOR FAULT. CLEANED CONTROL CABIN SENSOR T485, SYSTEM OPS CHECKS GOOD IAW B737-800 AMM 21-61-00-700-806-002.