What was found
DURING CLIMB, THROUGH 10,000', WSHLD CTRL CAUTION LIGHT ILLUMINATED IMMEDIATELY WITH SELECTION OF WINDSHIELD HEAT TO NORM. CAUTION LIGHT CONTINUED TO CYCLE OFF AND THEN BACK ON FOR REMAINDER OF FLIGHT. DIVERTED AND ACCOMPLISHED UNEVENTFUL LANDING. REMOVED FROM SERVICE. REPLACED F/O WINDSHIELD, REF Q400 AMM 56-10-01-000-801, 56-10-01-400-801. RETURNED TO SERVICE.