As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2142 AIR CONDITIONING PACK HOT LIGHT DURING CRUISE WITH CABIN/FLIGHT COMPARTMENT IN AUTO MODE. FOLLOWED CHECKLIST AND LIGHT EXTINGUISHED. C/W FUNCTIONAL TEST OF THE TEMP CONTROL SYSTEM IAW AMM 21-60-00-720-801. OPERATION CHECK GOOD. COULD NOT DUPLICATE PROBLEM. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.