411 HVAC Service Contractors in Knoxville, TN

Knoxville's warm humid summers — 88°F July highs with persistent moisture — and cold Appalachian winters drive demand for HVAC service across both seasons. hvac-service Knoxville TN is one of the larger markets in this directory with 129 contractors, a 4.6 average rating across 42,525 reviews, and 27 available 24/7. That combination of market size and availability reflects the real service demand in East Tennessee.

Service call diagnostics run $75–$200, tune-ups $70–$200, and standard repairs average $150–$1,200. Tennessee mandates the CMC-C mechanical license for HVAC contractors — verify state licensing before scheduling any service visit.

Hiller Plumbing, Heating, Cooling & Electrical earns praise across multiple technicians — Ron, Alex, and Andrew each appear in specific positive reviews. A 10-year customer cited Hiller correcting work done incorrectly by a prior contractor, a trust indicator that carries weight. Pipe Wrench, Knoxville's most-reviewed home services company at 5,718 reviews and 4.8 stars, has technician Brandon praised for professional after-hours service and Kyle highlighted for thorough, methodical work throughout complex service visits.