As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FWD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. FOUND C/B B9 ON P6-11 OPEN. PERFORMED C/B RESET REF AMM 20-60-01 NO DEFECTS NOTED. CLOSED C/B AND REMAINED CLOSED. PERFORMED WHCU BITE REF B737-800 FIM 30-41 TASK 801 BITE TEST OK NO FAULTS L/H FWD WINDOW OVERHEAT LAMP EXTINGUISHED. ALL REQUIRED TESTS PASSED.