Cleaning your air conditioner is not as difficult as you think and once you do it, you will have confidence in how to do it again. That’s what you need to do:
Clean the condenser coils: For this first step and for all subsequent steps, you must stop all the power entering the air conditioning unit. Turn off any power points you plug in and even turn them off on the circuit board, if possible. You will have to deal with the large external component of your system for this step and it is essential that there is no electricity in the system; you need to remove the outer casing, which will most likely require a screwdriver or similar tool. After removing the outer case, remove all other components that prevent access to the coils, and then locate the coils.