Quote Originally Posted by jpsmith1cm View Post
I'm sure the 550s are a very nice toy.

I played with them in a supply house, but I know the conditions I work under.

The 550 would simply NOT survive doing the job that I do day to day.

It's nice that you do comfy AC work in sunny Florida.

Not everybody does AC work nor does everybody live in sunny Florida.

Here in western PA, we see temperature extremes of -20F to 100F in the summer. On summer days, my DRSA goes from inside a freezer to on a roof.

From what I've read about the 550, internal condensation is a BIG problem. Seems to me that temperature swings like that are a very likely cause.

Want to ask again what freezing and thawing will prove?
-20 in Western PA.???? Humm I think he ment CA for CANADA...