As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - ON FLIGHT 2299, RETURNED TO FIELD, CAPTAINS WINDOW HEAT NOT WORKING WITH ASSOCIATED WINDSHIELD CONTROL CAUTION LIGHT. MAINTENANCE RESEATED AND LOCKED, LOOSE WIRE PIN AT RELAY 3041-K7, PIN B2. REPLACED BURNED RELAY 3041-K1. OPERATIONAL TEST GOOD. AIRCRAFT RETURNED TO SERVICE.