As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN TEMP INOP LIGHT ON DURING TAXI. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE C/W CABIN TEMP SENSOR FILTER CLEANING PER AMM 21-51-00. OPS CHECK OF AFT CABIN TEMP CHECKS ON GRD. C/W BITE CHECK OF CABIN TEMP. NO FAULTS FOUND. AIRCRAFT RETURNED TO SERVICE.