Cleaning the coil on a Goodman air conditioner's outside condensing unit regularly is one of the easiest ways to promote efficient cooling in your home. Clean the coil each month when you change the furnace filter (Goodman recommends a media filter to improve air quality). Performing this monthly preventative maintenance not only saves on utility bills, but maximizes the life cycle of the system and condensing unit coil. Removing any dust, dirt, grass clippings and leaves from the coil significantly improves the unit's function.
Turn off the air conditioner at the thermostat and disconnect the power at the circuit breaker. Disconnect the power at the disconnect box that is located on your home near the condensing unit. Contact an authorized Goodman air conditioner dealer if you have any questions on your thermostat operation.
Vacuum the accumulated debris from the coil with a wet-dry shop vacuum that is equipped with a brush. Do not touch the vacuum brush to the coils. Goodman brand outside condensing unit coils are easily accessible without removing the condensing unit housing for easy cleaning.
Spray water from a garden hose through the coil until the coil is clean and the water passing through it is clear. Goodman outside condensing units are installed at least 3 feet from your home so that you have access to the coil from any direction.
Turn the circuit breaker and the disconnect box back on.
Turn the thermostat back to the on position. Goodman recommends keeping your thermostat at a constant 78 degrees F for the most efficient operation.