Expert Furnace Installation & Repair | Marin & Sonoma

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.

Furnace Repair & Maintenance

When the furnace stops heating, blows cold air, keeps shutting off, smells wrong, gets loud, or leaves half the house chilly, the first job is diagnosis. John Owens Services repairs gas furnaces and forced-air heating systems across Marin and Sonoma County with a repair-first approach.

Our technicians look at the whole heating system, not just the first failed part. A dirty filter, weak blower, bad flame sensor, loose wire, thermostat issue, duct restriction, gas pressure problem, venting concern, or failing control board can all feel like “the furnace is broken.” We separate the small fix from the big problem before we recommend a larger spend.

Furnace Problems We Repair

• No heat, cold air from vents, or the furnace will not start
• Short cycling, overheating, lockouts, and error codes
• Ignition, pilot, flame sensor, gas valve, and burner problems
• Blower motors, capacitors, limit switches, pressure switches, and control boards
• Thermostat and wiring issues
• Rattling, banging, scraping, burning smells, or unusual furnace noise
• Airflow problems caused by filters, ducts, registers, or blower settings
• Carbon monoxide and venting concerns that need immediate attention
• Furnace Services
• Furnace Installation Services
• Heating & Cooling Services
• Air Duct Cleaning Services

Furnace Repair & Maintenance Questions

Should I shut the furnace off if I smell gas or burning?

If you smell gas, leave the home and call the gas utility or emergency services first. If there is an electrical or burning smell, shut the system off and call for service.

How do I know if the furnace should be replaced instead?

Age, repair history, safety, comfort, energy use, and repair cost all matter. We give the diagnosis first, then the practical options.

Furnace Installation & Replacement

Furnace installation is the right move when the old system is unsafe, unreliable, expensive to keep alive, or no longer matches the home. John Owens Services installs and replaces furnaces across Marin and Sonoma County with attention to sizing, airflow, ducts, venting, safety, and long-term serviceability.

A replacement furnace should not be chosen by square footage alone. The ductwork, insulation, home layout, gas supply, venting, thermostat, return air, and comfort complaints all matter. We look at the whole system so the new furnace heats evenly and can be maintained properly.

When Furnace Replacement Makes Sense

• The furnace is old and repair costs keep stacking up
• A cracked heat exchanger, unsafe combustion, or major corrosion is found
• Parts are no longer reliable or available
• The system is loud, uneven, oversized, undersized, or inefficient
• You are remodeling and the existing heating system no longer fits the home
• You want to compare furnace replacement with heat pump options and rebates
• The ducts or airflow need to be corrected as part of the installation
• Furnace Services
• Furnace Repair Services
• Heat Pump Services
• Financing

Furnace Installation & Replacement Questions

How long does furnace installation take?

Many straight replacements can be completed in a day, but duct changes, access problems, venting corrections, or electrical/control updates can add time.

Do you help compare furnaces and heat pumps?

Yes. If electrification, rebates, or cooling are part of the decision, we can compare a furnace replacement with heat pump options.

Will you check the ductwork too?

Yes. Duct problems can make a new furnace feel like an old one. Airflow and return air are part of a responsible replacement conversation.