Good to see techs from other countries putting out videos. However, in my experience, you really dont want to use any kind of pressure washer or pressure hose to clean out ac coils that are already bented up and brittle. A slow flowing hose with chemical cleaner if you need. However, trying to spray through the coils themselves with a pressure washer runs the risk of bending and breaking fins on that already old and damaged coil. Sometimes, taking a nylon brush to the squirrel cages helps before spraying water in because you get a chance to displace the dust before just spraying water in. Sometimes the water doesn't remove th dust, it just shoots it down in the cage compartment and then when it dries it stays stuck there.
