Trusted Heating & Furnace for San Francisco Homeowners
Heating and furnace service in San Francisco typically costs $175–$825 for repairs and $95–$235 for tune-ups, with most jobs completed same-day when you call (855) 600-3322. At Northstar Heating & Air, Daniel Okafor handles every heating and furnace call personally as both owner and lead technician, bringing 10 years of hands-on experience and a 4.9-star rating across 357 verified reviews to every San Francisco home and business we serve.
San Francisco’s heating demands are unique. Our marine layer keeps summers mild but brings damp, penetrating cold from November through March, especially in neighborhoods like the Richmond and Sunset where older homes with original furnaces struggle to keep up. We’ve replaced heat exchangers in Victorians near Alamo Square, tuned up Bryant systems in Noe Valley condos, and performed emergency ignitor replacements in Chinatown apartments at 10 p.m. on a Saturday. When your furnace quits or your heat drops off, you’re not calling a dispatcher who sends whoever’s available. You’re calling Daniel directly, and he’s the one who shows up.
We carry OEM parts for nine major HVAC brands and stock the components that fail most often in San Francisco’s salty, humid coastal climate. That means fewer return trips and faster restoration of heat. Emergency heating service is available for urgent residential and commercial needs across the city.
What Our Heating & Furnace Service Includes
Furnace Repair
Furnace Repair addresses anything from a system that won’t start to one that cycles constantly without reaching your thermostat setting. In San Francisco, we see a lot of blower motor failures caused by the fine coastal dust that works its way into older units, plus control board issues from the power fluctuations common in neighborhoods with aging electrical infrastructure. Daniel personally diagnoses the problem using digital multimeters, combustion analyzers, and infrared temperature guns to pinpoint the failure rather than replacing parts speculatively. Most furnace repairs in San Francisco run $175–$825 depending on the component and accessibility.
Furnace Replacement
Furnace Replacement becomes necessary when repair costs approach 50% of a new unit’s price, when the heat exchanger cracks, or when your system is past 15–20 years and efficiency has dropped significantly. San Francisco’s mild heating loads mean we often recommend properly sized 80% AFUE units rather than overspending on 95%+ condensing furnaces that won’t pay back in this climate. Daniel handles the load calculation himself, measures your ductwork, and selects equipment that matches your home’s actual needs. A typical furnace replacement in San Francisco costs $4,130–$8,850 including permits, which we pull for you.
Furnace Tune-Up
A Furnace Tune-Up is preventive maintenance that catches problems before they cause mid-winter failures. Our tune-up includes combustion analysis, gas pressure verification, blower amp draw testing, heat exchanger inspection with a borescope camera, and thermostat calibration. In San Francisco, we pay special attention to corrosion on burner assemblies from the persistent moisture in our air, and we clean flame sensors that get coated with oxidation. Annual tune-ups cost $95–$235 and typically take 60–90 minutes. They’re the single best investment to avoid emergency calls.
Heat Exchanger
The heat exchanger is the metal chamber that separates combustion gases from your breathable air, and a crack or failure here is a genuine safety hazard that can introduce carbon monoxide into your home. We inspect heat exchangers with high-resolution borescope cameras during every tune-up and repair call, and we test for CO with calibrated digital detectors. If we find a crack, we shut the system down and explain your options clearly. Heat exchanger replacement is sometimes viable on newer units; on older furnaces, full replacement is usually more cost-effective. We never patch or ignore a compromised heat exchanger.
Ignitor Replacement
The hot surface ignitor or spark ignitor lights your furnace’s gas burner on every heating cycle, and it’s one of the most common failure points we see in San Francisco. These ceramic components are fragile and degrade with thermal cycling; a typical ignitor lasts 3–5 years. When your furnace clicks but won’t fire, or cycles briefly then shuts down, the ignitor is the prime suspect. Daniel carries replacement ignitors for all nine major brands we service, including OEM and quality aftermarket options. Most ignitor replacements are completed in under an hour.
Gas Valve Repair
The gas valve controls fuel flow to your burners and includes pressure regulation, safety shutoff, and in modern units, electronic modulation for efficiency. Symptoms of gas valve problems include delayed ignition, burner rollout, or the furnace failing to reach full output. Gas Valve Repair requires specific expertise because incorrect pressure settings create safety risks and efficiency losses. Daniel tests inlet and outlet pressure with a digital manometer, checks for proper valve sequencing, and replaces only when repair isn’t viable. We don’t guess with gas components.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service for Heating & Furnace
We’ve built our reputation on brand-agnostic expertise across the full range of residential and commercial heating equipment. Our experience with York systems runs deep, particularly their Affinity and LX series furnaces common in San Francisco’s mid-century apartment buildings. We stock York ignitors, control boards, and blower motors, and we’ve resolved the pressure switch issues that plague their induced-draft units in our coastal climate. Daikin furnaces and their modulating gas valves require precise setup that many generalists miss; Daniel has factory training on their communicating systems and carries the proprietary diagnostic tools to troubleshoot error codes accurately.
Bryant and American Standard represent two ends of the United Technologies family, and we service both with equal fluency. Bryant’s Evolution series with variable-speed blowers demands proper dip switch configuration that we’ve seen butchered by technicians rushing through calls. American Standard’s Platinum series offers excellent efficiency, but their heat exchanger warranties require documented annual maintenance, which we provide with detailed records. Whether you have York, Daikin, Bryant, American Standard, or any other make, we can help. Our 9 major brands, one company approach means no referral runarounds and no “we don’t work on that” excuses.
Signs You Need Heating & Furnace Right Now
- Your furnace runs but blows cold air. This points to a failed ignitor, flame sensor, or gas valve issue that’s preventing proper burner ignition. In San Francisco’s damp climate, condensation in the burner compartment accelerates corrosion on these components. Don’t keep cycling the system, you’ll damage other parts and risk unburned gas accumulation.
- You smell gas or burning odors when the heat turns on. A brief dust-burning smell on first startup is normal, but persistent gas odor or electrical burning requires immediate shutdown and professional inspection. We treat gas odor calls as emergencies and respond same-day anywhere in San Francisco.
- Your carbon monoxide detector alarms, even intermittently. Any CO reading demands immediate evacuation and furnace shutdown. San Francisco’s tightly sealed older homes can accumulate dangerous levels quickly. We inspect with calibrated meters and won’t restart your system until we’ve identified and resolved the source.
- The furnace cycles on and off every few minutes. Short cycling wastes energy, overheats components, and leaves you cold. Causes include clogged filters, faulty limit switches, oversized equipment, or blocked flues. In hillside neighborhoods like Nob Hill and Russian Hill, we’ve found bird nests in vent terminals causing exactly this pattern.
- Your heating bills jumped without explanation. A 30% or greater increase suggests declining efficiency from dirty burners, cracked heat exchangers, or failing blower motors. We measure actual versus rated efficiency during tune-ups and show you the numbers so you can decide on repair versus replacement with real data.
Our Heating & Furnace Process — Step by Step
- 1
Direct contact and scheduling. When you call (855) 600-3322, you reach Daniel directly, not a call center. We confirm your symptoms, check parts availability for your brand and model, and schedule at your convenience. Emergency heating calls in San Francisco typically get same-day response, often within 2–4 hours.
- 2
On-site diagnosis with documented findings. Daniel arrives with a fully stocked service van, introduces himself, and begins systematic diagnosis. We use combustion analyzers to measure efficiency and safety, digital manometers for gas pressure, and borescope cameras for heat exchanger inspection. You see what we see.
- 3
Clear explanation and upfront pricing. Before any work begins, we explain the problem, show you the failed component or test results, and provide a written estimate with our ol75–$825 repair range for your specific job. No hidden fees, no pressure tactics. You approve or decline, no obligation.
- 4
Precision repair or replacement with OEM parts. We install manufacturer-specified or equivalent-quality components, torque to spec, and verify operation across the full cycle. For furnace replacements, we handle city permits, coordinate inspections, and commission the system with proper airflow measurement.
- 5
Testing, documentation, and follow-up. We run complete heating cycles, verify thermostat communication, and provide written documentation of all work performed, parts installed, and efficiency readings. Daniel leaves his direct contact information and follows up within 48 hours to confirm satisfaction.
How Much Does Heating & Furnace Cost in San Francisco?
A typical furnace repair in San Francisco runs $175–$825 depending on the failed component, brand parts availability, and whether the unit is in a cramped attic or accessible basement. Furnace tune-ups cost $95–$235 and include full combustion analysis, safety testing, and cleaning. Full furnace replacement ranges from $4,130–$8,850 including equipment, permits, and installation labor.
Several factors push pricing within these ranges. Accessibility matters: furnaces in tight San Francisco crawlspaces or rooftop mechanical rooms take longer to service. Brand affects parts cost, American Standard and Bryant OEM components typically run higher than Goodman equivalents. The age of your system influences whether repair is even viable; we won’t charge for a diagnosis if we recommend replacement and you choose to proceed with us.
To avoid overpaying, get a written estimate before work begins, verify the technician will show you the failed part, and ask whether they’re using OEM or generic components. Our free estimates include all of this. Call (855) 600-3322 for an exact quote on your specific furnace and situation.
Heating & Furnace Near San Francisco — Our Service Area
Northstar Heating & Air serves the full San Francisco metro with typical response times of 30–60 minutes to Mission District, Noe Valley, and Visitacion Valley properties, and under 90 minutes to outer neighborhoods and nearby communities. We also maintain active service routes to Winters, La Verne, Chinatown, San Dimas, Valley Center, Claremont, Newman, and Pomona for scheduled installations and commercial maintenance contracts. Whether it’s an emergency call or a full system install, we’re structured to respond without the delays common to larger franchise operations.
Serving San Francisco, CA — Our Local Coverage Area
We’re based in the San Francisco area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
Frequently Asked Questions — Heating & Furnace in San Francisco
Heating and furnace service encompasses repair, maintenance, and replacement of gas and electric furnaces that warm your home or business. At Northstar Heating & Air, this includes everything from emergency ignitor replacements and gas valve repairs to complete system replacements with load calculations and permit handling. Daniel personally performs all diagnostic and repair work, so the expertise you expect is the expertise that arrives.
Most furnace repairs in San Francisco are completed in 1–3 hours, with simple ignitor or flame sensor replacements often done in under an hour. Complex jobs involving gas valve replacement, control board programming, or heat exchanger inspection may extend to a half-day. We stock common failure parts for all nine major brands we service, which minimizes return trips. Call (855) 600-3322 to schedule, estimates are free.
Furnace repair in San Francisco typically costs $175–$825, tune-ups run $95–$235, and full replacement ranges $4,130–$8,850. The exact price depends on your brand, the failed component, and accessibility factors like whether your furnace is in a basement, attic, or rooftop mechanical room. We provide written, itemized estimates before any work begins. Call (855) 600-3322 for a free quote tailored to your system.
Yes, we service Bryant furnaces extensively, including their Evolution series with variable-speed blowers and Perfect Heat technology. Daniel has specific experience with Bryant’s communicating systems and carries the diagnostic tools to troubleshoot their fault codes accurately. We stock common Bryant ignitors, control boards, and blower motors. Whether you have Bryant or any other major brand, we can help.
Yes, emergency HVAC services are available for urgent residential and commercial heating failures across San Francisco. When your furnace quits during a cold snap or your heat exchanger cracks and triggers a CO alarm, we respond same-day, often within hours. Daniel handles emergency calls personally, so you get the owner and lead technician, not an after-hours subcontractor. Call (855) 600-3322 for immediate assistance.
All furnace repairs carry a written warranty on parts and labor, with specific terms provided on your invoice. Replacement installations include manufacturer equipment warranties that we register on your behalf, plus our installation workmanship guarantee. We document everything and maintain records so you’re never left searching for paperwork if an issue arises. A decade of doing this right means we stand behind every job.
Clear a path to your furnace and thermostat, note any error codes or unusual behaviors you’ve observed, and have your model and serial number available if possible. For safety, don’t attempt to disassemble any gas components yourself. If you suspect a gas leak, evacuate and call your utility’s emergency line first, then contact us. Daniel will handle all diagnostic and repair work when he arrives. Call (855) 600-3322 to book your appointment.
Schedule Your Heating & Furnace Service in San Francisco Today
Call (855) 600-3322 now for a free, no-obligation estimate on any heating or furnace need. Daniel Okafor answers directly, diagnoses personally, and stands behind every repair with 10 years of field experience and 357 customers’ worth of proven results. Same-day service is available for urgent calls across San Francisco and our extended service area.
Written by Daniel Okafor, Owner and Lead Technician at Northstar Heating & Air, serving San Francisco since 2014.