Let's see here, we have potential clients who need our services and we sometimes can't get past the way we think who they are and therefore we refuse them our services. Do I have that right?
I work in the New York City area and there are all kinds of,..., well, what most would think, strange looking client's, from all over the world, who dress differently and talk differently and etc, etc, differently. But over the years I've learned to deal with them and they are my client base and I have learned how to build a friendly business relationship with them. I've had to.
It is true, though, that technically advanced people tend to be slightly less socially sophisticated than non technical ones. I guess we can't have it all.
I'll let you in on a secret. Dave is condensed for a reason. He knows what he is talking about. He knows more about refrigeration than most and he got that way from experience with the public. Racism would go away if everyone would quit carying their feelings with them to work everyday. I think most people confuse a stereotype with racism. Sad, but that is what you get when you try to be "politically correct". Let the crybabys cry and go somewhere you can get paid!
P.S. Stereotypes are usually right on the money.
Don't know if this will help but I've run into a few coolers in the past where the one fan was pulling air while the other/s where blowing air, creating a bypass situation where little or no air passed thru the coil (therefore no heat load). That will cause a unit to frost up in a heart beat.
Another thing you may want to check, is if this unit will cycle off at any temperature. If not, you can rest assured it'll freeze up.
I assume your by the sound of your super heat reading you took this reading near your compressor. I agree that may be a little low but that really depends on the length of your line set.Don't know if you are flooding or not. You may try taking the reading at the same place your TXV is measuring it, ie, at the TXV sensing bulb. I typical try to make sure the valve is feeding liquid to almost the full length of the coil to insure I get all cooling possible from the coil.
Again, I hope this helps. I'd be curious to know what finally does the trick.