As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORT OF POSSIBLE PROBLEM WITH COPILOT SIDE WINDOW HEAT. TROUBLESHOOTING REVEALED BUSS TO BUSS RESISTANCE TOO HIGH, CAUSE FOR WINDOW REPLACEMENT. WINDOW VERY DIFFICULT TO REMOVE, EXTRAORDINARY MEASURES TAKEN, AS INCORRECT SEALANT WAS APPLIED DURING MANUFACTURE. SEALANT WAS NOT TYPE 1425 OR EQUIVALENT AS CALLED OUT IN MAINTENANCE MANUAL.