As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI IN SEA FOR DEP L SIDE WINDOW HEAT LIGHT ILLUMINATED IAW PROCEDURE: TURNED OFF; WAITED 2-3 MIN, TURN ON; LIGHT WAS OFF SO CONTINUED NORMAL PROCEDURES. PREVIOUS WRITEUP. GROUNDED - YES. PERFORMED OPS TEST OF LH SIDE WINDOW HEAT SYS REF B737-9 IFIM 30-41-00-810-830. TEST OK. NO FAULT NOTED.