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.
Before
After
Before
After
Before
AfterHVAC Company in Cotati, CA
Dalton Heating & Air handles heating and cooling work across Cotati, CA, from older ranch homes near downtown to newer construction east of Highway 101. Cotati’s small footprint and Sonoma County climate mean most systems here work hard through warm summers and damp, cool winters, and the housing stock spans everything from 1970s builds to homes less than a decade old. That mix changes how we diagnose, what parts we stock, and what we recommend. If your system has failed or is running poorly, call (361) 306-9515 and a live person will answer.
Why Cotati Homes Are Different
Cotati sits in a flat pocket of southern Sonoma County where summer afternoons regularly push into the 90s and winter nights dip into the 30s. Homes here are not uniform. The older neighborhoods around downtown Cotati and along Old Redwood Highway tend to have ductwork sized for the standards of the 1970s and 1980s, which often means undersized return air and airflow restrictions when a newer high-efficiency system is paired with old ducts. Newer subdivisions east of the freeway, built since the late 1990s and 2000s, are tighter and better insulated, but tightly sealed homes trap humidity and can make a slightly low refrigerant charge feel much worse than it measures on a gauge.
The other factor we see regularly in Cotati is the marine layer. Mornings are cool and damp, afternoons are dry and hot, and systems that run short cycles overnight can develop condensation issues in ducts and blower cabinets that homes further inland in Sonoma County rarely see. None of this is exotic, but it does mean a technician who treats Cotati like any other North Bay city will miss the easy fixes and chase the wrong problem. We carry parts for the common failures we see here, so we are not driving back and forth to a supply house on your clock.
Our Main Cotati Services
Most Cotati homeowners call us for one of three jobs: a cooling system that quit in the middle of a heat wave, a furnace that will not light on a cold morning, or a planned swap from an aging gas furnace to a heat pump. Each has its own Cotati page with full pricing and details.
AC Repair in Cotati
Cotati summers are short but intense, and when an air conditioner fails in August, the house heats up fast. The most common calls we get here involve failed capacitors, low refrigerant, clogged condensate lines, and blower motors that have worn out after years of daily cycling. Because Cotati has so many homes built in different decades, the repair often hinges on knowing which era of equipment and ductwork you are dealing with. We diagnose on site, put the price in writing before any work starts, and stand behind the repair for a full year. AC Repair in Cotati
Heat Pump Installation in Cotati
Heat pumps are becoming the default choice in Cotati for homeowners replacing old gas furnaces and aging air conditioners in one move. A properly sized heat pump handles both heating and cooling, and Sonoma County’s mild winters are well within the performance range of modern cold-climate units. The key in Cotati is sizing: many older homes near downtown have ducts that were never designed for a heat pump’s lower-temperature airflow, and that has to be measured and corrected before equipment goes in. Heat Pump Installation in Cotati
Furnace Repair in Cotati
When a furnace fails in Cotati in December, the house gets cold and stays cold. Most furnace failures we see here come down to a handful of causes: failed igniters, dirty flame sensors, failing inducer motors, and occasional gas-valve problems on older equipment. The age of the furnace matters a lot in Cotati, because many homes still run original equipment from the 1990s and early 2000s. We diagnose the exact failure, quote the repair in writing before touching anything, and guarantee the work for a full year. Furnace Repair in Cotati
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 Cotati
Our technicians train on nine major residential brands, and in Cotati we most often work on Goodman, Rheem, and York equipment, with Daikin showing up in newer heat pump installs. We keep common parts for these brands on our trucks, so most repairs in Cotati are completed the same day. See our brands for the full list.
Pricing for HVAC Company in Cotati, CA
| Service | Typical range in Cotati |
|---|---|
| AC repair | $150 – $650 |
| Furnace repair | $150 – $700 |
| AC installation | $3,500 – $7,500 |
| Tune-up | $80 – $200 |
What pushes a Cotati repair toward the high end of a range is usually the part itself: a compressor or indoor blower motor costs more than a capacitor or flame sensor, regardless of the city. What pushes an installation price up here is ductwork modification on older homes near downtown Cotati, or access issues in tight attic and closet spaces. Wherever your job lands, the price is in writing before any work starts, and it does not change at the door.
Neighborhoods We Serve in Cotati
We work throughout Cotati and the surrounding unincorporated parts of Sonoma County, from the older streets near downtown to the newer developments east of Highway 101. Our typical response window in Cotati is the same day for most repair calls, and the next day at the latest.
- Downtown Cotati and Old Redwood Highway corridor
- East Cotati and the newer subdivisions near the freeway
- West Cotati and the Gravenstein Highway side
- Neighborhoods along E Cotati Avenue and W Sierra Avenue
- Unincorporated Sonoma County homes just outside Cotati city limits
Service Area – Cities Near Cotati
Beyond Cotati, our crews cover the surrounding Sonoma County area. We regularly serve homeowners in Rohnert Park, CA, Petaluma, CA, Santa Rosa, CA, and Sebastopol, CA. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, and the technicians on your job are local to the Cotati area.
Serving Cotati, CA - Our Local Coverage Area
We’re based in the Cotati 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 Cotati
Most Cotati repair calls are handled the same day. Our scheduling is coordinated from a Bay Area office, but the crews assigned to Cotati work the area full time, so you are not waiting on a technician driving up from San Jose or down from Ukiah. Emergency calls take priority, and someone answers the phone 24/7.
Most equipment replacements in Cotati require a permit through the City of Cotati, and we handle that paperwork as part of the job. Repairs and maintenance generally do not require a permit. If you are unsure whether your job needs one, we will tell you before any work is scheduled, not after.
Yes. We service equipment regardless of who installed it or what brand it is. Roughly half the equipment we see in Cotati was installed by companies that no longer serve the area or have since closed. We stock parts for nine major brands and carry common replacement parts on the truck.
If you need heating or cooling work in Cotati, call (361) 306-9515 for a free estimate. A real person answers, and the price is in writing before any work starts.
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 Cotati Customers Say
"Installed a heat pump to replace an old oil furnace. Three clear quotes and the install crew was tidy."
- Cheryl B."Tech arrived in uniform right on time. AC wasn't cooling, found a failed capacitor, and replaced it in twenty minutes. The owner is a veteran and the company runs like it."
- Frank O."Blower motor died on the coldest night. They had the part on the truck and had us warm again the same day."
- Sandy G.