Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterHVAC Company in San Lorenzo, CA
Most HVAC calls in San Lorenzo aren’t standard repairs. They’re jobs shaped by concrete slab construction from the 1940s Bohannon tracts, original gravity floor furnaces still running in slab pockets, and homes that went 60 years without any cooling at all. We handle AC repair, furnace repair, and AC maintenance here, and every visit starts with a written price before we touch anything. Call us at (984) 538-9003 when you need a technician who shows up by name and photo, badged at your door.
Why San Lorenzo Homes Are Different
San Lorenzo’s housing stock is almost entirely David Bohannon postwar tract construction from roughly 1947 to 1955. These are small 1,000 to 1,200 square foot concrete slab ranch homes, built without central air conditioning and often with original gravity floor furnaces or wall heaters still in place. The slab construction means there’s no crawl space to run ductwork, which is the routing method HVAC contractors use in nearly every surrounding community.
When a furnace fails in one of these homes, we can’t simply drop a new unit into the same slab pocket. Current Alameda County mechanical code won’t allow it. We redesign the heat delivery strategy around attic air handlers and high-wall registers instead. For cooling, the same slab limitation makes ductless mini-split installs disproportionately common here compared to San Leandro or Hayward.
The climate adds another layer. San Lorenzo sits in the East Bay flatlands under frequent marine influence, with typical summer highs in the mid-70s. But Diablo wind events push temperatures into the 90s and 100s with little warning, creating sudden first-time cooling demand in homes that never needed it before. Corroded flue connections on aging original furnaces and the near-impossibility of routing supply-and-return trunks without major slab penetration are the baseline conditions we encounter on almost every call.
Our Main San Lorenzo Services
San Lorenzo homeowners call us most often for cooling repairs during surprise heat events and for furnace work on original heating systems that have finally reached their limit. Here’s what each service involves here.
AC Repair in San Lorenzo
Most AC repair calls in San Lorenzo come from first-time cooling systems, often ductless mini-splits installed to beat the slab-construction problem. We see compressor failures, refrigerant leaks, and electrical issues in units that are working harder than expected during Diablo wind heat spikes. Because many of these systems are newer installations, we stock parts for Goodman, Rheem, and other common brands used in local retrofits. AC Repair in San Lorenzo covers same-day diagnosis and repair with our 365-Day Done Right Promise.
Furnace Repair in San Lorenzo
Furnace repair here often means working on original gravity floor furnaces or early replacement wall heaters in Bohannon-era homes. We regularly find corroded flue connections, failed thermocouples, and cracked heat exchangers in units that have been running since the 1950s. When repair isn’t possible, we’ll explain exactly why and give you a written price for redesigning your heat delivery through attic-based equipment. Furnace Repair in San Lorenzo starts with a full safety inspection of every combustion component.
AC Maintenance in San Lorenzo
AC maintenance in San Lorenzo focuses on keeping ductless mini-splits and newer central systems running efficiently through the marine-layer humidity and sudden heat events that define our local climate. We clean coils, check refrigerant levels, test electrical connections, and inspect condensate drainage that can back up during foggy mornings. Regular maintenance prevents the mid-summer failures that leave families without cooling when temperatures spike unexpectedly. AC Maintenance in San Lorenzo includes a written report of everything we found and did.
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 in San Lorenzo
We service all major residential HVAC brands including Trane, Lennox, Goodman, and Rheem, and we stock common parts locally for faster turnaround on San Lorenzo repairs. Most calls are completed same day when the part is on our truck. our brands
Pricing for HVAC Company in San Lorenzo, CA
| Service | Typical range in San Lorenzo |
|---|---|
| AC Repair (minor, capacitor/contactor) | $150 – $350 |
| AC Repair (moderate, fan motor/refrigerant leak) | $350 – $500 |
| AC Repair (major, compressor/condenser) | $500 – $650 |
| Furnace Repair (minor, igniter/thermocouple) | $150 – $300 |
| Furnace Repair (moderate, blower motor/control board) | $300 – $500 |
| Furnace Repair (major, heat exchanger/valve) | $500 – $700 |
| AC Installation (ductless mini-split, typical San Lorenzo home) | $3,500 – $5,500 |
| AC Installation (full central with attic routing) | $5,500 – $7,500 |
| Tune-Up / Maintenance Visit | $80 – $200 |
What pushes prices higher in San Lorenzo: slab-on-grade construction requiring attic workarounds or ductless solutions, code-compliant redesign of gravity furnace replacements, and limited access in original Bohannon tract layouts. What you’ll never see: a bill that surprises you. We give a written price before any work starts, every single time, with no exceptions.
Neighborhoods We Serve in San Lorenzo
We work across all of San Lorenzo’s residential areas, from the original Bohannon tracts near Lewelling Boulevard to the later developments closer to Hesperian Boulevard. Most calls reach us within 30 minutes during standard dispatch hours from our San Francisco Bay Area coordination office.
- Bohannon Tract (original 1940s – 1950s ranch homes)
- Lewelling Boulevard area
- Hesperian Boulevard corridor
- Washington Manor
- San Lorenzo Village core
Service Area – Cities Near San Lorenzo
Our crews serve San Lorenzo locally and make regular calls to surrounding East Bay communities. We also work in Castro Valley, CA, San Leandro, CA, Union City, GA, and Oakland, FL. Dispatch and scheduling are coordinated from our San Francisco Bay Area office.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 HVAC Company in San Lorenzo
Most San Lorenzo calls are dispatched same day, with emergency heating and cooling responses prioritized when temperatures create genuine health risks. Call (984) 538-9003 and a live person will answer, 24 hours a day, to schedule your visit.
Yes, pulling a permit through Alameda County is required for furnace replacement, and current mechanical code prevents dropping a new unit into an original slab pocket. We handle permit paperwork as part of every replacement and redesign the installation to meet code. Call (984) 538-9003 for a free estimate on your specific home.
Concrete slab construction eliminates the crawl space used for ductwork in neighboring communities, making traditional central air retrofits unusually difficult and expensive. Ductless mini-splits avoid this entirely by running refrigerant lines through exterior walls. They’re the practical choice for most Bohannon-era homes. Call (984) 538-9003 to discuss whether ductless or attic-routed central makes sense for your house.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Lorenzo Customers Say
"Furnace short cycled all winter. He found a dirty flame sensor and cleaned it. Twenty minutes and a small bill."
- George Q."Knowing a vetted tech was coming into my house made a difference. Name and photo texted ahead, shoe covers, polite, and thorough with explaining."
- Tina M."Drain line was clogging and causing a leak by the air handler. They cleared it and installed a float switch so it can't flood again."
- Nora T.