As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED CLIMBING THROUGH FL 150, RED REAR BAY OVERHEAT LIGHT ILLUMINATED, CREW FOLLOWED CHECKLIST PROCEDURES. LIGHT EXTINGUISHED WHILE STILL CLIMBING THROUGH FL 180 RED REAR BAY OVER HEAT LIGHT ILLUMINATED FOLLOWED BY A BURNING ODOR AND LIGHT SMOKE IN COCKPIT.