The father and son team behind ALCO Mechanical were extremely knowledgeable and helpful. We had a non-functioning A/C unit since we moved into our home. It took us about 6 years before we called someone out because of fears of costs to repair a 20+ year old unit. We had called a local A/C company in Sacramento County whom showed up once and referred us to one of their more senior, experienced techs. They never called back.