1.Unplug unit.. Detach Front Panel ,pull out Air filter ,vacuum clean dust.
3. Brush and vacuum clean the evaporator.
4.Check for any other defects like noise/vibration and low cooling. Call for a technician
1.Pull out unit
2.Detach Electrical Control/Wirings
3.,Pressure spray evaporator ,condenser ,drain pan ,blower fans to completely remove dust and other debris.
5.Air Blow unit to let dry.
6. Re-connect electricals