A heat pump system includes two key coils: the indoor evaporator coil and the outdoor ... you need to routinely clean the outdoor coil. Dirt and debris buildup can impede airflow, reduce heat ...

As we swelter in the summer heat, no doubt we'll be busting out the fans and cranking up the ACs - but when was the last time you cleaned them? And how often do you need to?

Cleaning residential heat pumps installed high on walls is relatively standard; often there’s a latch to open the front cover of the indoor unit ... and cling to the coils and fan barrels ...