HVAC system repair in Sonoma County, CA

Repair usually makes sense when your system is under 15 years old and the fix is a single, straightforward issue. If your system is older, has needed multiple repairs recently, or the repair cost is approaching half the price of a new unit, replacement is often the smarter financial move for Sonoma County homeowners.

Heat pump repair is more involved because the system handles both heating and cooling through a refrigerant-based cycle, so a technician must diagnose refrigerant levels, the reversing valve, and the defrost cycle — components a furnace does not have. A furnace repair focuses on burners, the ignition system, and the heat exchanger, which is a different skill set entirely.

Weak or uneven airflow, a system that cycles on and off frequently, unusual sounds, or a home that stays too warm or too cold despite the thermostat being set correctly are all signs something is wrong. Sonoma County's seasonal temperature swings can push a struggling system past its limit, so catching these signs early helps avoid a full breakdown.

Yes, we repair furnaces, air conditioners, heat pumps, and thermostats for residential properties throughout Sonoma County and the surrounding counties. If your system is not heating or cooling the way it should, we can diagnose and repair the specific component causing the problem.

We serve homeowners across Sonoma County, Marin County, Napa County, Lake County, and Mendocino County. Whether you are in a rural part of Mendocino County or closer to the Marin border, we make the trip.

Custom Comfort was built around the goal of giving customers an honest, fair price — we explain what we found, what the repair involves, and what it costs before we start any work. You should never feel pressured or left guessing about what you are paying for.