Standard heat pumps are not recommended for Phoenix — summer ambient temperatures regularly exceed 110°F, beyond the design operating range of most residential heat pump outdoor units. Phoenix homes are better served by dedicated high-efficiency central AC systems paired with gas or electric heat for the mild winters. If you have an existing heat pump in the Phoenix metro, licensed contractors can diagnose refrigerant leaks, reversing valve failures, and compressor issues. Arizona requires HVAC contractors to hold a C-37 license from AZROC. Contractors listed here serve Phoenix and surrounding communities including Scottsdale, Tempe, Mesa, Chandler, and Gilbert.