The condenser fan has enough power to slice off fingers or break an arm or wrist. When I was an auto mechanic "Spray Nine" was everywhere. All that's left is putting the unit back together, cleaning up, and turning the electricity back on.
Rinse them with a sharp spray of water from a garden hose to remove the dust and debris in the filter. Weekend Projects. Harrington, Jenny.Air Conditioner Maintenance
These are subject to corrosion because of the galvanic difference between aluminum and copper, so most units have these joints covered with a "tarry goo". Everything You Need to Know Browse a full list of topics found on the site, from accessories to mudrooms to wreaths.
I always turn of the 30A breaker at the electrical panel.
For the guy who was all wet just from cleaning coils and shocked himself.... Clean a Plugged Evaporator Drain Step 9: Never use a pressure washer, since the pressure can damage the fins.
This is the same form of safety that is routinely performed when repairing vacuum cleaners, power saws, and the like. When the buildup is high the fins wont allow enough water to get through to effectively clean the outside without first spraying the outside While the unit is open I clean out any debris that has built up at the bottom of the unit.
It is not against electrical code. To do this we generally take the top or the fan off.
It's a fairly easy process so save some money by doing it yourself! The fins are sharp and can cause cuts or scratches. Key word there is creditable.