What was found
RIGHT SIDE WINDOW OVERHEAT ILLUMINATED DURING CLIMB THROUGH FL220. PERFORMED QRH, WAITED 5 MINUTES WITH RIGHT WINDOW SIDE HEAT OFF, THEN TURNED BACK ON, OVERHEAT ILLUMINATED AGAIN IMMEDIATELY. ACFT GROUNDED. PERFORMED WINDOW HEAT CONTROL UNIT BITE IAW FIM 30-41 TASK 801, FAULTED WHCU. PRECAUTIONARALLY CHECKED RESISTANCE OF WINDOW HEATING ELEMENT AND SENSOR IAW FIM 30-41 TASK 809 AND 30-41 TASK 811, BOTH ARE WITHIN LIMITS. REMOVED WHCU IAW AMM 30-41-000-801. INSTALLED WHCU IAW AMM 30-41-11-400-801. PERFORMED WHCU INSTALLATION TEST, TESTED GOOD. PERFORMED WINDOW HEAT CONTROL UNIT SYSTEM TEST IAW AMM 30-41-11-710-801, TEST PASSED.