As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEATER SMELLED HOT DURING DESCENT. MAINTENANCE INSPECTED THE HEATER NO EXTERNAL DEFECTS NOTED. FURTHER INSPECTION REVEALED THAT THE COMBUSTION BLOWER MOTOR AND FUEL REGULATOR REQUIRED REPLACEMENT IN ORDER TO RETURN THE HEATER TO A SERVICEABLE CONDITION.