[dankoos]

My outdoor AC unit has collected a lot of white pollen like stuff from the trees over the last few years. Is there a safe way to clean that off...pressure washer?

 

[yuri]

Ideally you should vacuum it first and then blow it out with a air compressor or leaf blower or shop vac that blows.

Then spray it out with a garden hose sprayer, NO pressure washer or the fins bend and collapse.

If you just hit it with water and no vacuum then it turns into newspaper/pulp. That is why I hate spine fin coils. Some techs have a method of burning them clean with a torch and supposedly Train etc talked about it? Sounds dangerous as he*ll and I would never do it.