As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT VALVE LIGHT(WING ANTI-ICE) ILLUMINATES WHEN SWITCH IS TURNED ON. GROUNDED - YES. PERFORMED LT WING THERMAL ANTI ICE VALVE HEALTH CK REF B737-9 FIM 30-11-11-200-801 LT WING ANTI ICE VALVE HEALTH CK PASSED. NO EXISTING FAULTS LOGGED ON MAINT MSG PG. A/C OK FOR CONT SVC.