Furnace service is the broad heating lane for homes that need a warmer, safer, steadier house but are not sure yet whether the answer is maintenance, repair, replacement, duct work, or a different heating system. John Owens Services handles furnace service across Marin and Sonoma County with a repair-first approach and local technicians who have worked on North Bay homes since 1986.
We do not treat every furnace call like a sales appointment. We start with the system in front of us: thermostat, filter, blower, ignition, flame sensor, gas supply, safety switches, venting, ducts, and the way the home is actually heating. If maintenance or a focused repair is enough, that is the recommendation. If the furnace is unsafe, oversized, badly worn, or no longer worth sinking money into, we explain the replacement path clearly.
This page is the hub. Use the repair page if the furnace is acting up and you want diagnosis before replacement. Use the installation page if the equipment is at the end of its life or you are planning a replacement.
A Santa Rosa furnace in a newer subdivision, a Mill Valley home with tight access, a Petaluma older home, and a San Rafael or Tiburon house with duct issues do not all need the same answer. Our recommendations are based on the home, the equipment, safety, comfort, and cost over time.
Yes. Repair-first is the normal path unless the furnace is unsafe, badly worn, or the repair cost does not make sense.
Yes. John Owens Services works throughout Marin and Sonoma County, including Novato, Mill Valley, San Rafael, Tiburon, Petaluma, Santa Rosa, and nearby communities.
Yes. If electrification, rebates, comfort, or cooling are part of the conversation, we can compare furnace replacement with heat pump options instead of forcing one answer.
From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.