Re: HVAC guy installed without permit no cold air etc...help!!
Can't advise too much without knowing what the stipulations of the contract were. Technically, a permit must be pulled and several inspections occur during the course of installation.
Technically speaking, regardless of contract, a permit would be required, and if one was not pulled, then likely corners were cut and you paid top dollar anyway. Contact your building authority and apprise them of the situation, the brunt of the fault will lay with the "contractor" who misinformed you, didn't pull the permit, and did the job without inspection.
How all this will work in your favor will depend on the will of the gods and the court system in your area. Where I'm at, the contractor would be seriously screwed!
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!