Fast, Reliable Heating & Furnace Across Sebastopol
Heating and furnace repair in Sebastopol typically costs $150–$700 for repairs and $3,500–$7,500 for full replacement, with most service calls completed same day. Crestview Heating & Air California has been serving west Sonoma County for nearly two decades, and our Heating & Furnace team makes the run to Sebastopol regularly from our San Jose base. We’re familiar with the fog-belt climate, the orchard-lot housing stock, and the specific challenges that come with heating systems in this unique corner of Sonoma County. Call us at (844) 560-6978 for a free estimate.
Why Crestview Heating & Air California Is Sebastopol’s Preferred Heating & Furnace Company
Our 4.8-star average across 250+ reviews didn’t come from easy jobs in new subdivisions. It came from showing up to difficult ones, explaining the work honestly, and fixing it right. In Sebastopol, that reputation travels fast through a community that values word-of-mouth over advertising.
Marcus Feldman, our owner, still works as Service Manager on jobs. That means when you call Crestview, you’re not getting routed through a dispatcher who has never held a manifold gauge. You’re getting an owner-managed operation where accountability isn’t a slogan, it’s the structure of the business.
We’ve replaced furnaces in Victorian homes near downtown Sebastopol, sized heat pumps for ranch houses off Bodega Avenue, and troubleshot moisture-compromised ductwork in crawl spaces under 1970s owner-built homes on former Gravenstein apple orchards. That range of experience matters here, where the housing stock is anything but uniform.
Our emergency HVAC service means Sebastopol customers aren’t left waiting when a heat exchanger cracks on a cold January night. We don’t promise impossible response windows we can’t verify, but we do prioritize emergency calls and have made the drive up Highway 12 at hours when most shops have gone to voicemail.
Our Heating & Furnace Services in Sebastopol
Furnace Repair
Furnace repair in Sebastopol runs $150–$700 depending on the component and accessibility. The most common calls we get involve ignitor failures, gas valve malfunctions, and limit switch trips caused by restricted airflow. In Sebastopol’s older housing stock, we also see plenty of short-cycling issues from oversized furnaces that were never properly matched to the mild heating loads of the fog belt. A furnace that blasts too much heat too fast shuts off before it can run a full cycle, and that wear accumulates.
We replaced a 1970s furnace in a former apple orchard home on Gravenstein Highway; the old unit had a cracked heat exchanger from years of short-cycling due to oversizing. We installed a properly sized Lennox heat pump with supplemental strips, running new refrigerant lines through the crawl space, which had moisture issues we mitigated with a vapor barrier.
Furnace Replacement
Full furnace replacement in Sebastopol typically falls between $3,500–$7,500, including equipment, labor, and any necessary duct modifications. This is where Sebastopol’s unique housing market really shows. Many homes here were built with heating only, no mechanical cooling, and no ductwork designed for modern air handlers. Retrofitting a new system into a 1960s owner-built home with non-standard framing requires more than swapping boxes. It requires planning for proper airflow, combustion safety, and often, integration with new heat pump technology ahead of California’s gas-phaseout timeline.
We size every replacement for actual heating loads, not rule-of-thumb estimates. In Sebastopol’s mild winters, that often means smaller equipment than homeowners expect, running longer, more efficient cycles instead of blasting and shutting off.
Furnace Tune-Up
A furnace tune-up in Sebastopol costs $80–$200 and should happen annually before the heating season begins. Given the fog-belt humidity, our Sebastopol tune-ups pay special attention to condensate drainage, heat exchanger inspection for corrosion, and blower compartment moisture. We also check gas pressure and burner alignment, because even mild winters demand reliable ignition when that marine layer rolls in and temperatures drop into the 30s.
For homes with crawl-space ductwork, we’ll flag moisture intrusion we spot during the tune-up. Catching it early prevents the mold growth and duct degradation that forces far more expensive repairs later.
Heat Exchanger Inspection & Replacement
Cracked heat exchangers are a safety issue we take seriously, and they’re more common in Sebastopol than the mild climate would suggest. The culprit is usually short-cycling from oversized equipment, not age alone. A furnace that fires up and shuts off repeatedly expands and contracts its heat exchanger far more than one running steady cycles. We inspect with visual methods, combustion analysis, and when indicated, borescope examination. If replacement is needed, we’ll give you straight guidance on whether the unit’s age and condition warrant repairing or moving to a new system.
Ignitor Replacement
Hot surface ignitors fail predictably after 3–5 years of seasonal use, and Sebastopol’s heating season, while mild, runs long enough to accumulate wear. We stock replacement ignitors for Goodman, Rheem, Lennox, and Trane systems commonly found in local homes. Most ignitor replacements are same-day repairs, getting your heat back without a wait for parts.
Gas Valve Repair
Gas valves can stick, leak, or fail to open fully, causing delayed ignition, rollout, or complete failure to fire. We test manifold pressure, check for proper coil resistance, and replace valves when repair isn’t safe or reliable. Given Sebastopol’s mix of older gas piping and newer earthquake-valve installations, we also verify that safety shutoffs are functioning correctly during any gas valve service.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Sebastopol
Your system, our specialty. We maintain factory-trained compatibility across nine major brands, and for Sebastopol customers, we regularly stock parts for Trane, Lennox, Goodman, and Rheem, the four most common names we encounter in local homes. That local parts inventory means faster turnaround on repairs and fewer return trips. Whether you have a 15-year-old Goodman in a ranch house off Pleasant Hill Road or a newer Lennox heat pump in a downtown Craftsman, we’ve worked on it before. No brand gets dismissed, no customer gets told to call someone else.
Common Heating & Furnace Problems We See in Sebastopol Homes
- Cracked heat exchangers from short-cycling. Oversized gas furnaces in older Sebastopol homes fire hard and shut off fast in mild winters. That thermal cycling fatigues heat exchanger metal over time, creating cracks that can leak combustion gases into living spaces. We catch this during tune-ups and recommend properly sized replacement before it becomes dangerous.
- Moisture-damaged ductwork in crawl spaces. The marine fog that keeps Sebastopol cool in summer drives humidity into crawl spaces under 1960s owner-built homes. We’ve pulled down flexible ductwork that’s sagging with condensation, mold, and in some cases, collapsed entirely from water weight. Repair or replacement requires addressing the moisture source, not just the symptom.
- Discontinued parts for legacy gravity furnaces. Victorian homes near Sebastopol’s downtown core still run original gravity furnaces or early forced-air conversions. Blower motors, fan switches, and proprietary gas controls for these units haven’t been manufactured in decades. We source compatible replacements or fabricate solutions, but often the honest recommendation is full system replacement with modern, efficient equipment.
- Failed ignitors and gas valves in seasonal-use systems. Components that sit idle through Sebastopol’s long mild season can fail to fire when first called upon in November. Annual tune-ups prevent most of these no-heat surprises, but when they happen, we carry the parts to fix them same day.
Pricing for Heating & Furnace in Sebastopol, CA
Here’s what heating and furnace service actually costs in Sebastopol’s market:
| Service | Price Range |
|---|---|
| Furnace Repair | $150–$700 |
| Furnace Replacement | $3,500–$7,500 |
| Furnace Tune-Up | $80–$200 |
Several factors push costs toward the higher end. Crawl-space work under homes with moisture issues takes longer and requires protective measures. Homes with no existing ductwork need complete distribution design. Long refrigerant line runs to detached workshops or ADUs add material and labor. And Victorian or owner-built homes with non-standard framing often need custom mounting solutions.
We don’t guess at your job over the phone. Every estimate we provide in Sebastopol is free, in-person, and specific to your home’s actual conditions. Call (844) 560-6978 to schedule yours.
We Also Serve Cities Near Sebastopol
Our service area extends throughout west Sonoma County and beyond. We regularly take calls from Roseland, Larkfield-Wikiup, Santa Rosa, and Rohnert Park, often on the same trip that brings us to Sebastopol. If you’re in one of these neighboring communities and need heating or furnace service, the same team, same pricing, and same owner-managed accountability apply.
Serving Sebastopol, CA — Our Local Coverage Area
We’re based in the Sebastopol 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 — Heating & Furnace in Sebastopol
High furnace bills in mild winters almost always indicate an oversized system short-cycling instead of running efficient, longer cycles. An oversized furnace blasts heat, satisfies the thermostat quickly, shuts off, and repeats, wasting fuel during startup and never reaching steady-state efficiency. In Sebastopol’s fog-belt climate, proper sizing for actual heating load, not peak demand, typically means smaller equipment than homeowners expect. Call (844) 560-6978 for a load calculation and free estimate on right-sizing your system.
Yes, and it’s one of the most common requests we get in Sebastopol, where generations of homes were built with heating only and no mechanical cooling. Because summer loads are low thanks to the marine layer, ductless mini-splits or properly sized heat pumps often make more sense than traditional central AC retrofits. Many of these homes also lack ductwork entirely, making ductless systems the practical path. We’ll evaluate your home’s layout, electrical panel capacity, and your comfort goals to recommend the right approach. Estimates are free.
Absolutely. We’ve installed equipment in Sebastopol’s counterculture-era homes with non-standard framing, unconventional floor plans, and crawl spaces that barely qualify as accessible. The job takes more planning and sometimes custom mounting, but we’ve yet to encounter a home we couldn’t serve. We bring the same 19 years of field experience to these challenging installs that we bring to straightforward replacements. Call (844) 560-6978 and we’ll come assess your specific situation.
We service and install equipment from nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Sebastopol’s replacement market, we frequently recommend Lennox and Rheem heat pumps for their efficiency in mild climates, and Goodman systems for reliable value in budget-conscious retrofits. We’ll match the brand and model to your home’s needs, not push whatever we have in the warehouse. Every recommendation comes with a free, written estimate.
Sometimes, but often a dedicated ductless mini-split or small heat pump makes more sense. Homes on former orchard parcels along Gravenstein Highway and Bodega Avenue frequently include detached workshops, converted barn studios, or new ADUs that need conditioning. Tying these into a main home’s furnace requires long duct runs that kill airflow efficiency, or refrigerant lines that push into Sonoma County ADU permitting territory. We’ve handled both approaches in Sebastopol and can advise which fits your specific layout and budget. Call (844) 560-6978 for an exact quote.
Ready to get your Sebastopol home’s heating system sorted? Whether it’s a cracked heat exchanger, a failed ignitor, or a full replacement in a home with no existing ductwork, Crestview Heating & Air California has the field experience to handle it. Owner Marcus Feldman oversees every job as Service Manager, and our team brings nearly two decades of HVAC work to your door. Call (844) 560-6978 today for a free estimate, or to schedule emergency service if your heat is out now.
Written by Marcus Feldman, Owner at Crestview Heating & Air California, serving Sebastopol and Sonoma County since 2005.