rust stain from a/c unit driver side

Moved from ATC

The AC units have nothing to cause rust from the drainage. The roof AC drain water has mixed with a dirty roof and caused your problem. Most motorhomes drain from the roof and not from internal drains. Doug

What Doug said. Probably just dirt from the roof.

Maybe I'm confused. Which "problem" are you wishing to solve? There are several ways to solve water run off, from placing small plastic strips held on by dicor to drain hoses that drain off the side when in use. If it's the discoloration that's bugging you, some rubbing compound, (lightly) on the outside will get rid of the discoloration. You might want to start with Dawn liquid and move up from there until it's gone. Vinegar and baking soda works well too, including your foggy headlamps. Use caution though as mixing the two will cause it to foam like a shook up soda can. There's no danger other than making another mess you'll have to clean up.....Dennis

Got your PM and responded. There are no pictures attached or showing on this post.

That said, simply go to a place that sells plastic rails, usually a mobile home parts place and grab a couple pieces of rail material, cut them to proper length and apply them along the edge of your coach. This will direct the water off to wherever you want it to go. Another "fix" is to determine where the water originates from. My coach runs all condensation from the three A/C units down thru the coach and out the bottom thru hoses attached to the units. You'll have to look at yours to determine if the condensation collects in a pan or whatever. If it collects in a pan, drill a hole in the pan, insert a hose plug ( see picture below) into the hole and attach a hose to the plug. You can then direct the water off the roof. For a more permanent fix, dicor the hose along the roof line and the back of the coach...good luck....Dennis

Executive wrote:
Got your PM and responded. There are no pictures attached or showing on this post.

That said, simply go to a place that sells plastic rails, usually a mobile home parts place and grab a couple pieces of rail material, cut them to proper length and apply them along the edge of your coach. This will direct the water off to wherever you want it to go. Another "fix" is to determine where the water originates from. My coach runs all condensation from the three A/C units down thru the coach and out the bottom thru hoses attached to the units. You'll have to look at yours to determine if the condensation collects in a pan or whatever. If it collects in a pan, drill a hole in the pan, insert a hose plug ( see picture below) into the hole and attach a hose to the plug. You can then direct the water off the roof. For a more permanent fix, dicor the hose along the roof line and the back of the coach...good luck....Dennis

Or, leave it like it is and just go clean the dirt off every couple of months! :)