What was found
AT FL360, CAPTAIN S WINDSHIELD BEGAN ARCING AT BOTTOM LEFT BASE. SHORTLY AFTER IT BEGAN ARCING, WINDSHIELD SHATTERED ACROSS ENTIRE SCREEN. FOLLOWED QRH AND TURNED OFF WINDOW HEATER. NO CRACKING OBSERVED ON INSIDE OF COCKPIT. DECLARED AN EMERGENCY AND LANDED UNEVENTFULLY WITH NO FURTHER DEGRADATION OF WINDOW. PERFORMED CAPT S WINDSHIELD REMOVAL AND INSTALL FROM STEP F(2) THRU COMPLETION IAW AMM 56-11-11-04, OPS TEST FAILS POWER CIRCUIT AND SAFETY TESTS, FOUND TEMP CONTROLLER FOR LEFT SIDE, LOCATION 19DG TO BE FAULTY IAW TSM 30-42-00, REMOVED AND REPLACED WINDOW TEMPERATURE CONTROL UNIT (19DG) REF AMM 30-42-11-04 , OPS CHECK GOOD. A/C OK FOR SERVICE.