Furnace Repair in San Anselmo - On-Site Today, Diagnosis First

Fast, Reliable Furnace Repair Across San Anselmo

Most furnace repairs in San Anselmo run between $150 and $700, depending on the part that failed. We fix the common failures fast: gas valves, igniters, blower motors, flame sensors, and heat exchangers. Every repair comes with a written price before we touch anything and a full-year written guarantee. If your heat is out in San Anselmo right now, call (361) 306-9515. A live person answers, 24 hours a day.

Call (361) 306-9515

Our crews know the Ross Valley. We work in the flatlands near Center Boulevard, the hillsides off Sir Francis Drake, and the older pockets of Barber Avenue and Saunders Avenue. That matters because San Anselmo’s housing stock runs from 1920s bungalows to mid-century ranchers to recent builds, and each one fails differently. Our Furnace Repair team carries parts for all of them.

Why Dalton Heating & Air Is San Anselmo’s Preferred Furnace Repair Company

We’re a Garrison Partners company, operating under The Garrison Standard since 2003. That standard is specific: arrive inside the stated window, put the price in writing before any work starts, do the job by the book, leave the site clean, and stand behind the work for a full year. No exceptions, no fine print.

Marco Benitez leads our San Anselmo service area, and he holds every tech to The Garrison Code on every call. The tech who shows up at your door is background-checked, uniformed, and factory-trained on nine major brands including Trane, Lennox, and Goodman. You’ll know who is coming before they arrive. We don’t send subs.

When a San Anselmo homeowner calls with no heat, we treat it as urgent. Cold, damp nights in this valley make a dead furnace a health and safety issue, not an inconvenience. We dispatch to San Anselmo the same day on no-heat calls, and our techs arrive with common parts already on the truck: igniters, flame sensors, capacitors, gas valves, and pressure switches. That means fewer return trips and faster heat.

We also answer the phone. Always. No voicemail queue, no callback window. If you call at 2 a.m. from a cold house off Butterfield Road, you get a person who can dispatch a truck.

What The Garrison Standard Means on Your Furnace Repair

It means you get a written price before we start. Not an estimate range, not a verbal quote. A number on a work order. If the repair fails within the 365-Day Done Right Promise period, we return at no charge. That’s not an upgrade, not a service plan. It’s included with every repair we do in San Anselmo.

Furnace Tune Up in San Anselmo

A Furnace Tune Up in San Anselmo runs $80 to $200 and is the single best thing you can do before the wet season settles into the Ross Valley. We inspect the heat exchanger for rust and cracks, clean the flame sensor, test the igniter, check gas pressure, measure temperature rise across the system, and verify the inducer motor and blower are pulling correct amperage. We do this with the same written-price discipline: you know the cost before we begin.

Why Damp Off-Seasons Make Tune-Ups Matter Here

San Anselmo’s marine-influenced climate means your furnace sits idle for long stretches in cool, damp air. That moisture settles on metal surfaces inside the unit. Flame sensors corrode. Igniters weaken. Heat exchanger surfaces develop surface rust even when the furnace hasn’t run much. A tune-up catches that before a cold morning turns into a no-heat call.

What You Get After the Tune-Up

You get a written report of exactly what we found, what we cleaned or adjusted, and what we’d watch going forward. Our techs are not paid on what they sell, so the report is about your furnace, not a commission target. If something is failing, we show you the part and give you a written price to fix it. You decide.

Emergency Furnace Repair in San Anselmo

Emergency Furnace Repair in San Anselmo handles the calls where the house is cold and getting colder. A failed furnace in a Ross Valley winter, with damp air and nighttime temperatures dropping into the 30s, is a real problem. We treat these calls as priority dispatch, and our techs carry the parts that fail most often: igniters, flame sensors, capacitors, gas valves, thermocouples, and pressure switches.

What Qualifies as an Emergency

No heat on a cold night. A gas smell near the furnace. A burning odor from the vents. Loud banging or grinding from the blower. Any sign of carbon monoxide detector activation. If it’s a gas smell or a CO alarm, shut the unit down, open windows, and leave the house. Then call us and call your gas utility. We’ll dispatch a tech to San Anselmo as fast as possible.

Same-Day Response to San Anselmo Homes

We schedule no-heat calls in San Anselmo the same day you call. Our dispatching is coordinated from our San Francisco Bay Area office, but the crews are local to Marin and know the Ross Valley roads, the permit history, and the local housing stock. When a tech says they’ll be there inside the window, they mean it. That’s The Garrison Code.

Trusted Brands We Service in San Anselmo

Our techs are factory-trained on Trane, Lennox, Goodman, Rheem, and the rest of the nine major residential HVAC brands. That training matters because a Goodman gas valve and a Trane gas valve are not the same part, and they don’t fail the same way. For San Anselmo customers, we stock common replacement parts locally for these brands so most repairs happen on the first visit. If you’ve got an older Rheem in a hillside home off Butterfield or a Lennox in a bungalow near downtown, we know the quirks of both.

Common Furnace Repair Problems We See in San Anselmo Homes

• Igniter and flame sensor failures from shoulder-season dampness. Furnaces in San Anselmo sit through long damp spells between heating seasons. Moisture in the air attacks the igniter’s ceramic element and leaves residue on the flame sensor, which causes ignition failure or short-cycling the first cold morning of the year.
• Heat exchanger surface rust with low runtime hours. A 20-year-old furnace in San Anselmo might have only run 3,000 hours total, but it’s been exposed to damp off-season air for 20 years. The heat exchanger can rust and crack from corrosion, not from overuse. That’s why we inspect them with a camera during every repair and tune-up.
• Short-cycling from oversized or undersized equipment. Many San Anselmo homes were remodeled without a new load calculation, or the original furnace was sized by old rules of thumb. That leads to furnaces that heat the house too fast and shut off, or run constantly and never satisfy the thermostat. The fix is sometimes a repair, sometimes a properly sized replacement.
• Failing capacitors in inducer and blower motors. Capacitors weaken with age and with damp, cool crawlspaces, which are common in San Anselmo’s older homes. When the capacitor fails, the inducer motor can’t spin up, the pressure switch never closes, and the furnace locks out. We see this regularly in mid-century ranches throughout the Ross Valley.

Pricing for Furnace Repair in San Anselmo, CA

San Anselmo’s Climate Changes the Repair-Versus-Replace Math

Here’s what a generic furnace repair page won’t tell you about San Anselmo. The Ross Valley sits in a cool, marine-influenced microclimate. Winters are mild and wet, not brutally cold. Your furnace runs fewer hours than one in Concord or Sacramento would. That sounds like good news for the equipment, but it hides a problem: damp off-season air attacks the metal inside the unit even when it isn’t running. So a 22-year-old furnace in San Anselmo can have low total runtime and still have a corroded heat exchanger, a failing inducer motor, and an igniter that’s ready to quit. Runtime hours alone cannot decide whether to repair or replace here. You have to look at the condition of the metal, the age of the electrical components, and the actual load the house needs.

That’s exactly the evaluation we do. Furnace Repair in San Anselmo starts with the failed part, but it doesn’t stop there. We check the whole system and give you honest numbers: what the repair costs today, what a replacement would cost, and how a SEER2-rated system would change your heating bill. No pressure, no upsell. Just the facts so you can make the call that fits your house and your budget.

We Also Serve Cities Near San Anselmo

Our San Anselmo crews also cover Fairfax, Kentfield, San Rafael, and Larkspur. If you’re in one of those towns and your furnace is down, the same written pricing, same-day response, and full-year guarantee apply. Call (361) 306-9515 and tell the dispatcher where you are. We’ll route the nearest truck to you.

FAQs About Furnace Repair in San Anselmo