Best Heat Thermostats in Phoenix AZ

I've worked with Amy & Mark of A&M Mechanical for the better part of a decade starting with my first home purchase. They've earned my trust beginning with our first interaction that continues to this day. They, as the operators, and their crew of technicians are respectful, knowledgeable and trustworthy as they've maintained my various brands of HVAC units and thermostats. They do a great job explaining issues when I want to dive deep and better understand the system or warranties and have always appeared happy to do so.