Warranty taking long to fix AC, how to be proactive with renter

[Sameer Deshmukh]

Renter having problem with AC and we filed home warranty claim. Vendor showed up and requested AC replacement. However after that, warranty has been stalling claim, doing multiple apts, second opinion and still no action on problem resolution after more than a month. Looks like they do this so they dont have to replace AC. Renter is getting upset and I want to resolve the problem in a reasonable manner. Would like to understand if other landlords here faced the problem and what action they took and what is the best way to cover you as a landlord.