How do I keep my outdoor AC unit clean in fall?

Regular fall cleaning of your outdoor AC unit will help it last longer and run more efficiently when summer returns. Start by turning off power to the unit at both the outdoor disconnect switch and your home's electrical panel for safety.

Remove debris from around and inside the unit by clearing away leaves, twigs, and other organic matter that has accumulated over the summer. Use a garden hose to gently spray the condenser coils from the inside out - this removes dirt and debris that blocks airflow. Avoid using a pressure washer as the high pressure can damage the delicate aluminum fins. If the fins are bent, you can carefully straighten them with a fin comb available at hardware stores.

Trim back vegetation around the unit to maintain at least 2 feet of clearance on all sides. This prevents leaves from blowing into the unit during fall storms and ensures proper airflow when you start using the AC again next year. Check that the unit is level and sitting securely on its pad - Ottawa's freeze-thaw cycles can sometimes shift outdoor units.

In Ottawa's climate, it's especially important to protect your AC unit during winter. After cleaning, consider covering the top of the unit with a piece of plywood or a specially designed AC cover to prevent ice and snow from accumulating inside. However, never completely wrap the unit in plastic or tarps, as this can trap moisture and cause corrosion.

While homeowners can handle basic exterior cleaning, the internal components should be serviced by professionals. A licensed HVAC technician can check refrigerant levels, inspect electrical connections, and ensure everything is ready for next season. For comprehensive fall maintenance or if you notice any damage during cleaning, Ottawa HVAC Pro offers seasonal tune-ups to keep your system running efficiently.