As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2359: ENG ADPT HEAT 1 CAUTION LIGHT ON. MAINTENANCE INSPECTED NR 1 ENGINE INTAKE HEAT. REMOVED AND CLEANED AND REINSTALLED CONNECTOR PLUGS. CLEARED MEMORY. GROUND RAN A/C. OPS CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.