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
AfterFast, Reliable Furnace Repair Across Cotati
Furnace repair in Cotati typically runs $150 – $700, and most no-heat calls are diagnosed and fixed the same day. If your furnace won’t stay lit, short-cycles, or blows cold air through a Cotati winter night, call us at (361) 306-9515 and we’ll have a background-checked technician at your door inside the stated window. We work in Cotati every week, from the ranch homes off East Cotati Avenue to the newer builds near Sonoma State, so we know how local furnaces fail and what it takes to fix them right.
Why Dalton Heating & Air Is Cotati’s Preferred Furnace Repair Company
Homeowners in Cotati call us because we show up when we say we will and the price doesn’t move once we’re at the door. Every repair gets a written price before any work starts, and every repair carries a written guarantee for a full year. If the work doesn’t hold, we return to Cotati at no charge. That’s not a promotion. It’s The Garrison Standard, the operating code our company has followed since 2003.
Marco Benitez runs our crews, and he holds every technician to The Garrison Code: arrive inside the window, price in writing before starting, do the job by the book, leave the site clean, and stand behind the work for a full year. Cotati homeowners consistently mention the same things: the technician called ahead, wore shoe covers, and explained the repair in plain terms before touching anything.
We’re factory-trained on nine major residential brands, including Trane, Lennox, Goodman, and Rheem, so the repair we do on your Cotati furnace is the repair the manufacturer intended, not a workaround. And when you call, a live person answers. 24/7. No voicemail queue, no callback window.
Furnace Maintenance in Cotati
Furnace maintenance in Cotati is a flat $80 – $200 visit where we inspect, clean, and test the components that fail most often in this climate. Coastal fog and crawlspace moisture eat at control boards and igniters here, and a furnace that hasn’t been opened in three years is a no-heat call waiting to happen on the first cold morning. We recommend a tune-up every fall, before the first sustained cold snap, and we’ll give you a written report of what we found, what it costs to fix now, and what can wait.
What a Cotati Tune-Up Covers
We pull the burner assembly, clean the flame sensor, test the igniter, check gas pressure, and measure the temperature rise across the heat exchanger. We also test the blower motor’s amp draw and check the control board for the corrosion we see routinely on Cotati furnaces that sit in garages or crawlspaces near the fog line.
Why Maintenance Prevents Bigger Repairs
A dirty flame sensor mimics an ignitor failure. A weak capacitor looks like a dead blower motor. The $80 – $200 tune-up catches these before they become a $400 emergency call on a cold night in Cotati.
Heat Pump Repair in Cotati
Heat pump repair in Cotati runs $150 – $650, and the most common issue we see is a refrigerant charge that’s drifted low enough to trip the low-pressure switch in cold weather. A heat pump is just a furnace that moves heat instead of making it, and when the refrigerant charge is off, it can’t pull enough heat out of 38-degree air to warm your house. We repair all major brands, including the Trane and Rheem heat pumps common in Cotati’s newer infill duplexes.
Defrost Board and Reversing Valve Issues
When a heat pump in Cotati freezes over and won’t defrost, the defrost control board has usually failed. It’s a $200 – $450 repair on most units. A stuck reversing valve looks worse than it is too: the system runs but pushes heat outside instead of in. That one is cheaper to fix than most homeowners expect, and we’ll show you the diagnosis before quoting anything.
When a Heat Pump Repair Is the Better Call
Cotati’s mild winters mean a heat pump often makes more sense to repair than replace, especially if the compressor is healthy and the unit is under 12 years old. We’ll run the numbers honestly. If a repair buys you another four winters for $400, that’s usually the right call. We won’t sell you a replacement you don’t need.
Trusted Brands We Service in Cotati
Our technicians are factory-trained on Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Cotati homeowners, that means we show up knowing your furnace’s quirks instead of learning them on your dime. We stock common parts for Trane, Lennox, Goodman, and Rheem units on our local trucks, so a furnace repair in Cotati often gets done in one visit instead of two. That matters when the overnight low is 34 degrees and your blower motor is dead.
Common Furnace Repair Problems We See in Cotati Homes
- Short-cycling on undersized ducts. The mid-century ranch homes throughout Cotati were built with smaller duct runs, and when a newer, larger furnace gets installed on top of them, the system trips the high-limit switch and shuts down early. The fix is often a load calculation and static pressure correction, not a bigger furnace.
- Failed blower capacitors. The same weak-capacitor problem that kills summer AC takes out winter heat in Cotati. When the blower never spins up, the furnace lights and then shuts off on the high-limit switch. It’s a $150 – $300 repair we handle same day.
- Corroded control boards and igniters. Furnaces in Cotati garages and crawlspaces sit in fog-adjacent moisture for months. We see intermittent no-heat calls that trace back to a control board with corroded solder joints or an igniter that’s cracked from rust. These look like ghost problems, but the fix is usually one part.
- Thermostat miscalibration mistaken for furnace failure. A surprising number of Cotati homeowners get quoted a full replacement when the actual problem is a thermostat reading the wrong temperature or a heat pump low on refrigerant. Both are cheaper fixes than a new unit, and we check these before recommending anything bigger.
Pricing for Furnace Repair in Cotati, CA
Furnace repair in Cotati runs $150 – $700 for diagnostic work plus a common part replacement. That covers things like ignitors, flame sensors, blower capacitors, and limit switches on most residential units. Heat pump repair lands at $150 – $650. A furnace maintenance visit is $80 – $200. The price goes up when the repair involves a control board, blower motor, or gas valve, which is why we put the full price in writing before any work starts. You will not get a surprise line item at the door. Call (361) 306-9515 for a free estimate on your specific issue.
| Service | Price Range in Cotati |
|---|---|
| Furnace repair (diagnostic + common part replacement) | $150 – $700 |
| Heat pump repair | $150 – $650 |
| Furnace maintenance / tune-up | $80 – $200 |
| AC repair | $150 – $650 |
| AC installation | $3,500 – $7,500 |
The Cotati-Specific Repair vs. Replace Reality
Cotati’s building stock splits evenly between mid-century ranch homes near downtown and newer infill duplexes further out, and the older half has a recurring problem we don’t see in cities with newer construction. The ducts in those ranch homes were sized for the original, smaller furnace, and when a previous owner swapped in a bigger unit, the furnace now short-cycles on the high-limit switch instead of running to setpoint. Homeowners get told they need a new furnace when what they actually need is a proper load calculation, a static pressure test, and often just a corrected blower speed or a modest duct repair. We run those numbers on every repair call in Cotati, and we show you the math before recommending anything.
A homeowner on Myrtle Avenue in Cotati called us because their Carrier furnace would run ten minutes, shut off, and leave the house cold by morning. Our tech found the heat exchanger was fine, but a failing blower motor was pushing static pressure past the limit switch’s trip point. That was a $420 repair, verified with a load calculation that confirmed no replacement was warranted. We replaced the blower motor, recalibrated the thermostat, and the furnace held temperature through the night. That’s the difference between a company that diagnoses and a company that sells.
We Also Serve Cities Near Cotati
Beyond Cotati, our Furnace Repair team handles calls throughout southern Sonoma County. We’re in Rohnert Park, Petaluma, Santa Rosa, and Sebastopol weekly, often same day for no-heat emergencies. If you’re in Cotati or a neighboring city and the furnace won’t hold a flame, call (361) 306-9515 and we’ll get you on the schedule.
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 Furnace Repair in Cotati
That’s usually a repair, and in Cotati it’s often a specific one. Furnaces in our older ranch homes short-cycle because the ducts are undersized for the unit installed, and the high-limit switch shuts the system down as a safety measure. We run a load calculation and static pressure test to verify, then fix what’s actually wrong, usually a blower motor or duct issue in the $150 – $700 range. Call (361) 306-9515 and we’ll diagnose it honestly before recommending anything.
A load calculation measures your home’s actual heating requirement room by room, and it tells us whether the furnace is the right size for the house. In Cotati, where many ducts were sized for smaller original furnaces, a load calculation often reveals the furnace is fine but the airflow isn’t. That changes a would-be $5,000 replacement into a $400 repair, and we do this check on every repair-versus-replace call.
SEER2 matters for replacement, not repair. If you’re fixing a heat pump or furnace, the existing unit’s rating doesn’t change how we repair it. But if the repair bill climbs toward half the cost of a new SEER2-rated unit, we’ll show you both numbers and let you decide. Cotati’s mild climate means the payback math on higher efficiency works differently here than in the Central Valley, and we’ll be straight about it.
Most furnace repairs in Cotati run $150 – $700 on a written, upfront price. Heat pump repair runs $150 – $650. You’ll see the number in writing before any work starts, and the repair is guaranteed in writing for a full year. Call (361) 306-9515 for an exact quote on your unit, free.
Repair is the right call for most furnaces under 15 years old with a failing part and a healthy heat exchanger. Replacement makes sense when the heat exchanger is cracked, the unit is past 18 years, or the repair cost exceeds 40% of a new system. In Cotati, we run a load calculation and show you both paths with real dollar figures. No pressure, just the numbers.
Written by Marco Benitez, Owner at Dalton Heating & Air, serving Cotati since 2003.