Reno:
What you are alluding to is akin to a new resi (SFD) failing final inspection for an incorrectly wired GFI, or some other 'dumb' item that the EC should have discovered when HE walked thru the house prior to final.
That said, the 'service' providers here in NJ are not a whole lot better than what you have. Seems like the only ones that do answer the phone and actually respond are 'Plumbers'. What the heck!
