As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DECK WILL NOT WARM UP ON AUTO TEMP SELECT. UPON DOING IT MANUALLY A SMELL OF BURNED COMES OUT OF ACFT DUCT. AFTER REPLACEMENT OF RELAY 8HD FLIGHT DECK TEMP IS CONTROLLABLE. NO BURNING ODOR NOTED FROM ANY PARTS OF THE ACFT AT THIS TIME.