In Polar Bear Auto Care's warehouse-size shop, ASE-certified techs slip under hoods to fix or install air-conditioning and heating systems. Those systems are nearly identical to the factory units, as many of the systems they install are made by the same manufacturers. On their walls hang hundreds of parts, with more stored onsite, including new heater cores as well as compressor mounts for car models from the years 1965 to 1999. This lets them work on all kinds of vehicles, from brand-new cars and tractors to RVs and vintage UFOs. They back up their services with a two-year or 24,000-mile warranty, which extends to electrical repairs as well as the maintenance of steering, exhaust, and brake systems.