As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2190, LEFT WINDSHIELD HOT CAUTION ILLUMINATED ON TAXI OUT WITH HEAT SELECTOR SET TO NORM. AS PER MTX CONTROL RESET THE SWITCH AND THE CAUTION LIGHT CAME ON AGAIN AFTER 30 SECONDS. LIGHT EXTINGUISHES IMMEDIATELY WHEN SELECTED TO WARM UP. MAINTENANCE REPLACED 3041-K6 AND 3041-K9 RELAYS. REPLACED CAPTAINS WINDSHIELD HEAT CONTROLLER. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.