As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAN NOT CONTROL COCKPIT TEMP IN MANUAL OR AUTOMATIC MODE. COULD NOT SELECT A CABIN TEMP COOLER THAN 85 DEGREES. AT ONE POINT IT GOT SO HOT SMOKE WAS COMING OUT OF THE COCKPIT AREA. SUPPLY TEMP WAS STEADY AT 210 DEGREES. //SIGNOFF// REMOVED AND REPLACED TEMP CONTROL VALVE AND CLEANED COCKPIT O-ZONE TEMP PROBE IAW AMM REF 21-60-00 OPS CHECK GOOD.