As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FWD WINDOW HEAT ON LIGHTS ARE NOT ILLUMINATED WITH SWITCHES IN ON POSITION. ACFT GROUNDED. REF FIM 30-41, TASK 801 WHCU BITE PASSED NO FAULT. WINDOW HEAT OPS CHECK NORMAL. INFO ONLY REF 737 SYS MANUAL SECT 3.010 CYCLING OF WINDOW HEAT ON LIGHT IN NORMAL OPERATION.