Furnace Cleaning in Los Angeles, CA

What a furnace cleaning actually involves

Gas valve off first. Power off at the switch or breaker. We pull the burner door and look before touching anything. Burners come out as an assembly on most LA units. Each port gets brushed and vacuumed. Rust scale and spider webbing block ports and cause rollout. The flame sensor gets scuffed with an abrasive pad, not sandpaper. Then the heat exchanger is inspected with a mirror and light for cracks at the bends.

The blower is the dirty half. A squirrel-cage wheel loaded with dust loses airflow fast. We pull the blower assembly when access allows and clean each fin. Caked wheels run out of balance and whine.

Los Angeles adds its own grit. Wildfire ash after Santa Ana events settles in supply runs and gets pulled back through a dirty return. Many houses converted from wall and floor furnaces have one hallway return grille feeding the whole system. High velocity, dust past the filter edges, a whistle you can hear at night. Attic air handlers near coastal neighborhoods rust at the plenum seams from damp salt air.

Old trunk lines may carry gray or black tape at the joints. That tape can contain asbestos. We stop and say so rather than disturb it.