Any kind of obstructions in the system as well as its different parts should be checked out. The frequent causes of obstructions in the system are dusts and other tiny things. So, acc cleaning should be carried out in order for obstruction to be eliminated. It's not a fairly easy job to clean up your HVAC. Evaporator cleaning, tube cleaning, heat exchanger inspection, and condenser cleaning, are the things involve in cleaning your HVAC.