Emergency Heating & Furnace When San Francisco Homeowners Need It Most
Call (855) 600-3322 now — fast same-day and after-hours emergency response. We’re Northstar Heating & Air San Francisco, and we’ve been providing Heating & Furnace services to get San Francisco homes warm again for over 10 years. When your heat goes out on a foggy January night in the Richmond or your floor furnace starts smelling like gas in the Sunset, you don’t have time to wait. We’ll pick up the phone, dispatch a technician, and get your system diagnosed fast.
Fast After-Hours Heating & Furnace Emergency Response in San Francisco
Call (855) 600-3322 — we answer emergency calls nights, weekends, and holidays. In San Francisco, a heating emergency isn’t just about comfort. When that marine layer rolls through the Outer Sunset and temperatures drop into the 40s, a failed system can leave your family genuinely cold. And in those pre-war Victorians and Edwardian flats across the Haight, Western Addition, and Noe Valley, many homes still rely on original radiant systems, in-wall gravity heaters, or those old Wedgewood and Empire floor furnaces tucked beneath hallway grates — equipment that was never designed to run 80+ years without Furnace Repair.
Here’s what counts as an emergency: no heat at all, a gas smell near your furnace, furnace blowing cold air in San Francisco, CA, loud banging or screeching from the unit, or carbon monoxide detector alarms. If you smell gas, leave the home and call PG&E first. Then call us. We’ll coordinate with you and arrive prepared.
While you’re waiting, turn off the system at the thermostat and check your breaker panel. Don’t attempt to relight a pilot if you suspect a leak. Our technicians carry common replacement parts for York, Daikin, and Bryant systems, plus universal components for those legacy floor furnaces we still encounter weekly in the Sunset and Richmond districts. Daniel Okafor, our owner, has built our inventory specifically around what San Francisco’s housing stock demands.
Emergency Heating & Furnace We Handle in San Francisco
- Complete heat loss in pre-war flats. Your gravity wall heater or floor furnace quit overnight, and your plaster-and-lathe walls hold zero insulation. We can’t wait on this — elderly residents and young children feel the cold fast in these drafty, high-ceilinged rooms. Our technician arrives with testing equipment to check gas valve operation, thermocouple output, and pilot assembly integrity. Most gravity heater failures trace to a failed thermocouple or blocked vent, both fixable same-day without a full replacement.
- Gas odor from legacy floor furnaces. Those original Wedgewood and Empire units in Sunset and Richmond homes lack modern rollout switches and pressure safety controls. A cracked heat exchanger or deteriorated gas valve can leak raw gas into living spaces. We treat every gas smell as urgent, testing with electronic leak detectors and combustion analyzers. If the unit’s unsafe, we’ll shut it down, tag it per SFGFD requirements, and walk you through replacement options — often a ductless Daikin heat pump system given San Francisco’s 2021 Reach Code restrictions on new gas furnace installations.
- Carbon monoxide alarm activation. Any CO alarm means immediate evacuation. Once you’re safe and PG&E has cleared the home, we perform full combustion analysis on your furnace, checking for cracked heat exchangers, blocked flues, or backdrafting. In San Francisco’s tightly packed Victorians, shared walls and complicated vent routing make CO risks particularly serious. We don’t clear a system until we’ve verified safe operation in writing.
- Heat pump failure during Diablo wind events. When those offshore winds push Mission, Bayview, and Potrero Hill into the 90s or beyond, your mini-split working in reverse for heating can fail under thermal load — or switch to emergency electric resistance and spike your PG&E bill. We diagnose refrigerant levels, defrost board operation, and compressor amp draw. Because San Francisco’s microclimates demand precise sizing, a unit that works fine in the fog may struggle inland; we’ll assess whether your system was properly specified for your specific neighborhood’s load profile.
Our Emergency Response Process
Call (855) 600-3322 and you’ll reach a live person, not a voicemail maze. We ask five quick questions: your address, the system type if you know it, what it’s doing (or not doing), whether you smell gas, and whether anyone in the home is vulnerable to cold.
We dispatch from our San Francisco base, not across the Bay Bridge. Our technician calls you en route with an ETA. Upon arrival, they perform full diagnostic testing — combustion analysis for gas equipment, refrigerant pressure checks for heat pumps, electrical testing for all components. You’ll get a clear explanation of what’s wrong and your options before any work begins.
We stock parts for common failures: ignitors, flame sensors, gas valves, thermocouples, capacitors, contactors, and defrost controls. Most emergency repairs complete in one visit. For systems requiring Furnace Replacement — especially those old floor furnaces with undersized 1/2-inch gas lines that can’t support modern equipment — we’ll provide a detailed quote and schedule prompt installation, handling all SFGFD permit coordination.
Payment is straightforward. We accept all major cards, and financing is available for larger replacements. Every emergency repair carries our standard warranty on parts and labor.
Emergency Heating & Furnace Cost in San Francisco
Call (855) 600-3322 for a free, no-obligation emergency assessment. Our diagnostic fee is straightforward, and we apply it toward any repair you authorize. Here’s what San Francisco homeowners typically see:
- Emergency diagnostic fee: $89–$149 (waived with approved repair)
- Common same-day repairs: $180–$450 (thermocouple, ignitor, flame sensor, capacitor)
- Gas valve or control board replacement: $400–$850
- Heat pump compressor or major component: $1,200–$2,800
- Legacy floor furnace replacement (ductless heat pump): $3,800–$7,500 depending on zones and electrical upgrade needs
We don’t charge extra for nights, weekends, or holidays. The price is the price. In San Francisco’s pre-war housing, labor often exceeds equipment cost when we’re routing lines through plaster ceilings or crawlspaces — we’ll tell you exactly why, exactly what it costs, and exactly what permits SFGFD requires before any work starts.
Frequently Asked Questions — Emergency Heating & Furnace in San Francisco
How fast can you get here for a heating emergency in San Francisco?
We typically arrive same day, often within hours for calls placed before evening. After midnight, we still answer and dispatch for true emergencies — no heat with vulnerable residents, gas smells, or CO alarms. Call (855) 600-3322 and we’ll give you a real ETA based on current traffic and your neighborhood.
Is it cheaper to repair my old floor furnace or replace it?
Repair is usually cheaper short-term, but replacement is often unavoidable. Those Wedgewood and Empire units are 50–70 years old, parts are scarce, and San Francisco’s 2021 Reach Code restricts new gas furnace installs in most permit work. We evaluate your specific unit honestly — if it’s repairable safely, we’ll fix it. If not, we’ll quote a ductless heat pump replacement that complies with current code. Call (855) 600-3322 for a free assessment.
Do you charge more for emergency after-hours calls?
No. Our diagnostic and labor rates are the same at 2 AM on Sunday as at 2 PM on Tuesday. We believe you shouldn’t pay a penalty for equipment that failed at the worst possible moment. The only variable is parts cost, which doesn’t change by hour. Call (855) 600-3322 — we’ll confirm your total before any work begins.
Can you fix heat pumps, or only gas furnaces?
We service both, and it’s increasingly important in San Francisco. Many homeowners in Noe Valley, the Castro, and the Mission have added Daikin or Bryant ductless systems for cooling, then rely on them for heating through our mild winters. We carry refrigerant, defrost controls, and compressor testing equipment for heat pump emergencies. Call (855) 600-3322 — we’ll ask a few questions to make sure we’re sending the right technician with the right parts.
What should I do while waiting for your technician?
Turn off the system at the thermostat and breaker if you suspect electrical or gas issues. Open windows slightly if you smell gas, leave the home, and call PG&E first. For simple no-heat situations, check that your thermostat has fresh batteries and the filter isn’t completely blocked. Don’t attempt DIY repairs on gas valves, heat exchangers, or high-voltage electrical components — these carry serious injury risk. Call (855) 600-3322 and we’ll guide you through safe steps while we’re en route.
Call for Emergency Heating & Furnace in San Francisco — Fast After-Hours Response
Your home shouldn’t be cold tonight. Call (855) 600-3322 now — live answer, fast dispatch, same-day repair. Daniel Okafor and our team at Northstar Heating & Air San Francisco have handled 357 verified emergency calls across this city’s unique housing stock, and we’re ready when you need us.
Written by Daniel Okafor, Owner at Northstar Heating & Air San Francisco, serving San Francisco since 2014.