One Hour

One Hour Heating and Air Conditioning provides residential heating and cooling services across Northern Virginia, including Ashburn, Sterling, and Leesburg. The company holds a 4.6-star average rating compiled from 543 customer reviews, with services spanning emergency repairs, system installations, and preventive maintenance for furnaces, heat pumps, and traditional split air conditioning units. Their workforce handles ductless split system retrofits alongside conventional ducted installations. Service appointments are available Monday through Saturday with reduced Sunday hours, accommodating both routine maintenance requests and urgent after-hours emergencies.

The contractor distinguishes itself through same-day service availability for urgent calls, a capability multiple reviewers specifically acknowledged. Their service menu includes heating system repair and installation alongside cooling equipment services, covering major components such as furnace ignition boards, compressor units, and capacitors. The company maintains expertise across multiple HVAC system types, enabling single-visit diagnostics for complex multi-system residences, a factor noted positively in accounts of whole-home replacement projects.

Customer accounts highlight consistent positive experiences with specific technicians. Reviewer Michael Magrath described a same-day technician response following heat pump failure, with subsequent installation completed within days and later return for dual-system whole-home replacement. The crew, led by a technician named Ludwig, arrived on schedule and performed thorough post-installation cleanup. Another reviewer, Josette Hodges, referenced a technician named Craig Moss who provided educational guidance about her AC system, explaining maintenance plans and financial planning for future equipment replacement while identifying cost-saving opportunities.