As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2 WINDOW HEAT ILLUMINATED. RAN CHECKLIST, WINDOW HEAT STAYED OFF. ACFT GROUNDED. PERFORMED R2 WINDOW CONTROLLER BITE TEST IAW FIM 30-41, 801. BITE TEST PASSED. FAULT HISTORY LOGGED SEVERAL WINDOW SENSOR FAULTS. TROUBLESHOT IAW FIM 30-41, 812. CHECKED RESISTANCE ON R2 WINDOW TEMPERATURE SENSOR. RESISTANCE NORMAL WITH 180F HEAT APPLIED. AS A PRECAUTION REMOVED AND REPLACED R2 WINDOW HEAT CONTROL UNIT IAW AMM 30-41-11-401. OPS CHECKED NORMAL.