What was found
CREW REPORTED, HEAVY ELECTRICAL SMOKE ODOR IN COCKPIT AND FRONT OF THE CABIN. PITOT 3 CIRCUIT BREAKER POPPED. MAINTENANCE REMOVED AND REPLACED CURRENT SENSOR HEATING RELAY NR 3 K0057 AND SOCKET XK0057 IAW EMB145 AMM 20-13-02/WIRING, AND 91-10-02, OPS CHECKED GOOD IAW EMB145 AMM #30-31-01. AIRCRAFT RETURNED TO SERVICE.