Air conditioner out. Dealer wants $1,800 to replace. Need recommend alternative.

IF the compressor is what you mean, keep in mind there are other parts that need to be replaced also!! Why did the original unit fail? That must be corrected to ensure the new compressor will last more than an hour!! Take your car to an independent shop for an estimate on the necessary parts and labor. Ask what and why while you are there, they should be happy to show and tell. We do it all the time! If any questions about the repair, post them here and we will help. Make a note of what is said you need for a reference just in case.

What component has failed? The compressor, condenser, evaporator, receiver/dryer, lines, control module?

you need to repl the whole system if compressor failed do to debis contaminating the system. remember you get what you pay for. im in orange county call me and il give you a quote,maybe i can get you a better price for quailty parts.some of my compressor kits come with a lifetime warranty on parts