Performed heater tune-up on a Ruud gas furnace system. Checked the electrical, mechanical and performance systems of the unit. Cleared, cleaned, flushed and treated the drain line and cleaned the exterior of the furnace. I did find the main breaker for the outdoor condenser system is oversized. The system is rated for a maximum 30 amp breaker and currently has a 40 amp breaker. No other issues were found. The system is operational at this time.