AC repair
Furnace & heating
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Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable Furnace Repair Across San Leandro
Furnace repair in San Leandro typically costs $150 – $700, and most jobs we handle are done same-day or next-day. If your heat is out on a cold, foggy San Leandro morning, you want a technician who knows the difference between a 1950s gravity furnace in Washington Manor and a newer forced-air unit near Bay Fair. Call (559) 245-8807 and you’ll get a live person and a written price before any work starts.
We serve the whole city, from the flatlands west of East 14th Street to the hillside streets where wind exposure pounds furnaces harder than the mild Bay weather would suggest. Our Furnace Repair team knows San Leandro’s housing stock: ranch homes built in the 1940s and 1960s with single-pane windows, minimal insulation, and heating systems that have been patched together for decades. When you call us, you’ll learn the name and see the photo of your technician before they arrive. They’ll show a photo ID badge at the door. That’s the Threshold Verified standard, and it’s how every Brandt HVAC visit works.
Why Brandt HVAC Co San Francisco Is San Leandro’s Preferred Furnace Repair Company
San Leandro homeowners tell us the same thing over and over: they want to know who’s coming to the door. Devin Marlowe built Brandt HVAC around that exact concern. Every technician we send to a San Leandro home is background-checked, identity-verified, and introduced by name and photo before the visit. When the doorbell rings, you already know the face. No guesswork.
Our response time to San Leandro neighborhoods is fast because we don’t route calls through a call center. A live person answers the phone 24 hours a day, including weekends and holidays. If your furnace quits at 2 a.m. in Estudillo Estates or the Washington Manor area, you reach a human who can dispatch a tech. That person knows San Leandro, knows where the BART corridor runs, and knows which neighborhoods have older gas valves and ignition systems that fail in specific ways.
We also write the price down before any work begins. Not an estimate after the fact. Not a vague range. A specific number on paper, agreed to before we touch a single component. If the repair fails within the guarantee period, we return at no charge under the 365-Day Done Right Promise. That promise covers parts and labor on every furnace repair we perform in San Leandro.
Styles & brands we work with
Emergency Furnace Repair in San Leandro
Emergency Furnace Repair in San Leandro is for the nights when the marine layer rolls in and your furnace locks out at 11 p.m. with kids asleep, or when an older system’s heat exchanger cracks and you smell something off. For most homes in San Leandro, an emergency furnace repair call runs $150 – $700 depending on the failed part. A no-heat diagnosis is fast. A gas valve replacement on a 1960s Rheem can run toward the higher end because the part must be sourced and the gas line pressure-tested after the swap.
After-Hours Response for No-Heat Calls
The phone is answered by a person, not a queue, any hour of the day. If your blower motor seizes or your ignitor gives out during a cold snap in the flatlands near Davis Street, we can usually have a tech to your door the same night. We don’t charge an overtime premium for after-hours furnace repair, and you’ll still get the written price before the work starts.
Propane Lockouts and Rural-Style Properties
Some San Leandro properties, especially on the hill side and in pockets without natural gas infrastructure, rely on propane tanks. When a tank runs dry during the first genuinely cold week of the year, the furnace locks out and won’t relight until the tank is refilled and the line purged. We service propane furnaces and can coordinate tank refill timing so you’re not waiting two days in a cold house. Our San Leandro technicians carry the fittings and regulators common on these systems.
Furnace Maintenance in San Leandro
Furnace Maintenance in San Leandro is how you avoid a January no-heat call, and on older systems it’s practically mandatory. A maintenance visit runs $80 – $200 and includes a combustion check, filter inspection, blower amp draw test, and a visual on the heat exchanger. For a 1950s Goodman or Lennox that’s been cycling for 60 years, that heat exchanger inspection is the difference between a warm house and a carbon monoxide risk you can’t see.
Pre-Season Tune-Up for Older Systems
We recommend San Leandro homeowners with furnaces over 20 years old schedule maintenance in October or early November, before the marine layer settles in and temperatures dip. Our techs often find failing ignitors, sooted flame sensors, and blower motors drawing too much amperage during routine visits. Catching those in a tune-up is a $150 – $300 fix. Missing them turns into an emergency repair at midnight.
Gravity Furnace Safety Checks
In Washington Manor specifically, we perform thorough heat exchanger inspections on original gravity furnaces. These units were built for a different era, and decades of thermal expansion and contraction eventually crack the metal. A cracked heat exchanger on a gravity furnace is a genuine carbon monoxide hazard, not a theoretical one. If we find one, we recommend replacement rather than repair, and we’ll scope the ductwork for asbestos before any conversion to forced air.
Trusted Brands We Service in San Leandro
We repair every major residential furnace brand found in San Leandro homes: Trane, Lennox, Goodman, Rhem, Carrier, Bryant, and York. No matter what name is on the cabinet, a furnace is a heat source, a gas valve, a blower, and a control board. We diagnose by behavior, not by badge. For San Leandro customers with a Trane or Lennox from the 1990s, we can usually find parts locally at Bay Area supply houses the same day. That means a Tuesday diagnosis doesn’t become a Thursday repair. It means your heat is back on while the afternoon fog is still burning off.
See the difference
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AfterCommon Furnace Repair Problems We See in San Leandro Homes
- Cracked heat exchangers in original gravity furnaces. Washington Manor has dozens of these still in service, and after thermal cycling for six decades, the metal fatigues. The risk isn’t just no heat. It’s carbon monoxide entering living space. We inspect them carefully and recommend replacement when the crack is confirmed.
- Propane lockouts on lots with no natural gas. Homes in the San Leandro hills and scattered parcels without gas mains rely on propane tanks that run empty during cold snaps. The furnace shuts down as a safety measure and won’t restart until the line is purged. We handle the repair side and coordinate with the propane supplier.
- Overheating and short cycling on wind-exposed hillside homes. Properties on exposed slopes without a wind break lose heat faster than the thermostat can keep up with. The furnace runs nonstop, overheats, and trips the limit switch. We check static pressure, blower speed, and duct sizing before replacing parts that aren’t actually broken.
- Ignitor failures in 1940s-60s tract homes with minimal insulation. The original furnaces in these homes were oversized for the structure, then the ignitors were worked hard every winter. A failing ignitor is a common $150 – $300 repair, but the underlying cause matters. We check the full ignition sequence so you’re not paying for the same repair twice.
Pricing for Furnace Repair in San Leandro, CA
Most furnace repairs in San Leandro fall between $150 and $700. An ignitor or flame sensor replacement usually lands around $150 – $300 including parts and labor. A gas valve replacement runs $300 – $600 on most units. A blower motor replacement, which requires removing the squirrel cage and rebalancing it, typically falls between $400 and $700 depending on the motor. A full furnace replacement is a different conversation, and we’ll give you a written, itemized price before any work is scheduled. Every repair comes with the 365-Day Done Right Promise: if the fix fails within a year, we come back at no charge. Call (559) 245-8807 for a free estimate. You’ll get a specific number, not a range.
| Service | Typical Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Maintenance | $80 – $200 |
We Also Serve Cities Near San Leandro
Our San Leandro crews also cover Castro Valley, Oakland, Alameda, and Walnut Creek. If you’re in one of those cities and need furnace repair, the same pricing and the same written guarantee apply. Call and we’ll route the nearest available technician.
Serving San Leandro, CA - Our Local Coverage Area
We’re based in the San Leandro area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in San Leandro
We plan for asbestos abatement before any ductwork is disturbed or removed. The old gravity furnaces in Washington Manor often have asbestos wrap on the ducts, and cutting into them without an abatement plan is both dangerous and illegal. When one of our techs arrived at a 1950s ranch in Washington Manor for a no-heat call, we found a 60-year-old gravity furnace with a cracked heat exchanger and asbestos-wrapped ducts. We isolated the asbestos, removed the old unit, and installed a new high-efficiency furnace with a properly sized blower motor, ensuring static pressure matched the home’s ductwork. We coordinate the abatement work with a licensed asbestos contractor before our crew touches the ducts. Call (559) 245-8807 and we’ll walk you through the sequence and the cost.
Yes, we service propane furnaces across San Leandro, including the hillside properties and lots without gas mains. Propane systems use the same burners and heat exchangers, but the gas pressure at the valve is different, and regulators need to be checked for freeze-ups during cold spells. We carry propane-rated parts and can diagnose a lockout caused by an empty tank, a failed regulator, or a gas valve that needs replacement. If your tank is empty, we can wait for the refill or schedule the repair the same day your propane company tops off.
The most common failure in San Leandro’s 1940s-60s ranch homes is a cracked heat exchanger on the original furnace, followed closely by a worn blower motor. The heat exchangers crack because the metal has expanded and contracted through 60 years of heating cycles. A blower motor wears out because it’s been pushing air through undersized or dirty ductwork for decades. Both are repairable, but when a heat exchanger cracks, we recommend replacement rather than patching. The risk of carbon monoxide is too high to gamble on a weld.
Yes, and it’s the first thing we do before sizing any replacement furnace on a wind-exposed San Leandro hillside lot. A furnace sized by square footage alone will be wrong for a home with no wind shelter and single-pane windows. We run a Manual J load calculation that accounts for your home’s actual insulation, window area, and wind exposure, so you get a furnace that heats the house without short cycling or overheating. If your existing furnace runs constantly on windy nights but never satisfies the thermostat, the problem is often a sizing or duct issue, not a broken part.
Yes, we repair heat pumps, and for San Leandro homes without natural gas, a heat pump is often the better alternative to propane. San Leandro’s mild Mediterranean climate rarely drops below freezing, which means a heat pump operates efficiently here year-round. We work on Bryant, Carrier, Daikin, and other heat pump brands, and we can convert a propane-only system to a dual-fuel setup if you want propane backup for the coldest nights. Call (559) 245-8807 for an honest comparison of repair costs versus conversion costs for your specific lot and system.
If your furnace is acting up in San Leandro, don’t wait until the next cold foggy night to deal with it. Call Brandt HVAC at (559) 245-8807. You’ll get a live person, a written price before any work begins, and a technician whose name and face you know before they knock. That’s how heating repair should work in San Leandro.
Written by Devin Marlowe, Owner at Brandt HVAC Co San Francisco, serving San Leandro furnace repair needs with background-checked, Threshold Verified technicians.