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 Danville
Most furnace repairs in Danville run between $150 and $700, and we usually have a technician at your door the same day you call. That price is always in writing before any work starts, and the repair itself is guaranteed in writing for a full year. If the fix doesn’t hold, we come back at no charge. That’s how Dalton Heating & Air has operated since 2003, and it applies to every call we take in Danville, from Blackhawk to the Diablo foothills.
Danville’s heating season isn’t as long as the Midwest’s, but when temperatures drop into the 30s on a January night and your furnace quits, the house gets cold fast. We know the streets here: Camino Tassajara, Green Valley Road, Sycamore Valley Road, Diablo Road winding up toward Mount Diablo State Park. Our dispatch is coordinated from the San Francisco Bay Area office, and our crews serve Danville locally, so we’re not routing a truck from an hour away. Call (361) 306-9515 and a live person answers, 24/7, no voicemail queue.
Why Dalton Heating & Air Is Danville’s Preferred Furnace Repair Company
Danville homeowners tend to ask sharp questions, and we’re ready for them. They want to know what the part costs, why it failed, and whether the fix will hold through the next cold snap. We give direct answers, because the price is in writing upfront and every repair carries a written guarantee. That’s not a policy we invented for Danville; it’s the Garrison Standard, and it’s been in place since 2003.
Our technicians are background-checked and uniformed, and you know who’s coming before they arrive. Each one is factory-trained to service nine major residential HVAC brands, including Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. That matters in Danville, where we see a mix of older single-stage furnaces and newer modulating systems, often in the same week.
When a Danville customer calls with no heat at 7 a.m. on a Tuesday, we don’t put them in a callback queue. A real person answers, and we schedule a window we actually keep. If the job isn’t done right, the 365-Day Done Right Promise means we make it right, for a full year, not a 30-day window. That’s the difference between a company that stands behind a repair and one that just hopes you don’t call back.
Heat Pump Repair in Danville
Heat pump repair in Danville often comes down to the same electrical and airflow components as a furnace, because our climate pushes these systems to switch between heating and cooling more often than in places with a single dominant season. A heat pump that runs nearly year-round accumulates wear on the reversing valve, the defrost board, and the compressor contactor, and a failure in any of those can leave you with lukewarm air on a 40-degree morning. Most heat pump repairs in Danville run $150 to $650, depending on the failed component.
Reversing Valve and Defrost Board Work
When a Danville heat pump blows cold air in heating mode, the reversing valve is a common suspect. That’s the part that flips the refrigerant flow so the system can heat instead of cool. A stuck valve or a failed coil usually means replacement, not repair. The defrost board is another frequent failure: it tells the outdoor unit when to melt ice off the coil during cold, damp mornings. When that board fails, the coil ices over and the system can’t deliver heat.
When Repair Beats Replacement
A heat pump under 10 years old in Danville is usually worth repairing if the compressor is still healthy and the failed part is isolated, like a capacitor, contactor, or defrost sensor. We’ll tell you plainly when a repair is the right call and when you’re better off putting repair money toward a new system. That honest repair-versus-replace guidance is the core of how we work in Danville.
Heating Repair in Danville
Heating repair in Danville covers the full range of no-heat and low-heat symptoms: a furnace that won’t ignite, a blower that runs but pushes cold air, or rooms that never reach the thermostat setpoint. Most heating repairs in Danville fall between $150 and $700, and the exact price is written down before we open the unit. That’s the only honest way to quote a repair, and it’s how we’ve done it since day one.
Ignitor and Gas Valve Failures
A furnace that tries to start but won’t ignite often has a failed hot surface ignitor, the small ceramic part that glows red to light the burner. Danville’s heat-and-cool cycling stresses ignitors over time, especially on furnaces that haven’t been tuned up in a couple of seasons. A gas valve that won’t open is a different job: it’s a safety-critical component, so we test it properly, replace it if needed, and verify gas pressure and flame signal before we leave. This is work for a trained professional, because natural gas and combustion air aren’t things to guess at.
Blower Motor and Airflow Work
When the burners fire but the air barely moves, the blower motor is often the issue. In Danville’s older homes, we also see undersized return ductwork that makes an otherwise healthy blower work too hard. The fix can be a replacement motor, a capacitor, or sometimes a duct modification to get static pressure back into range. We measure, we test, and we show you the numbers before we do the work.
Trusted Brands We Service in Danville
Our technicians are factory-trained and service all nine major residential HVAC brands, but around Danville we spend most of our time on Carrier, Trane, Lennox, Goodman, and Rheem equipment. We stock common replacement parts for these brands locally, which means a quicker turnaround when your furnace dies mid-season. Whether you have a high-efficiency Trane modulating furnace in Blackhawk or a straightforward Goodman single-stage unit in a Danville rancher, the technician who shows up knows the specific control boards, ignitors, and gas valves that brand uses. We don’t send a generalist to guess at a specialty system.
Common Furnace Repair Problems We See in Danville Homes
- Short-cycling from an oversized furnace. In larger foothill homes where a prior installer skipped a load calculation, we regularly find furnaces that are too big for the ductwork. The unit fires, overshoots, and shuts down before the house is evenly warm. The fix often involves blower speed adjustment and thermostat calibration, not a new furnace.
- Heat exchanger cracks on aging furnaces. Years of Danville’s heating-and-cooling cycles stress the metal in heat exchangers, especially on furnaces older than 15 years. A crack is a serious safety issue because it can leak carbon monoxide into the home. We test with a combustion analyzer and we’ll show you the readings.
- Weak capacitors and dirty blower motors. When a furnace hasn’t had a tune-up in over a year, the capacitor can lose its ability to start the motor, and the blower wheel gets caked with dust. That combination is behind a lot of no-heat calls in Danville. A capacitor replacement is usually a quick, affordable fix.
- Thermostat calibration drift in zoned homes. Multi-story Danville homes with zoned systems often run uneven because a thermostat reads a degree or two off. That means one zone overworks while another stays cold. Recalibrating or replacing a thermostat and verifying the zone dampers can solve what feels like a furnace problem without touching the furnace.
Pricing for Furnace Repair in Danville, CA
Furnace repair in Danville runs $150 to $700 for most jobs. A simple ignitor replacement or capacitor swap sits at the lower end. A gas valve replacement or a blower motor job lands higher. Before any work begins, you get a written price, and our repair labor is guaranteed in writing for a full year. Here’s the line-item pricing we quote in Danville:
| Service | Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune-Up | $80 – $200 |
| AC Installation | $3,500 – $7,500 |
What changes the number is the part that failed and how long it takes to diagnose safely. We don’t charge overtime for emergency calls, and estimates are free. Call (361) 306-9515 for an exact quote. If a repair seems borderline against the cost of a new furnace, we’ll tell you that too, because the math should be yours to make, not ours to push.
We Also Serve Cities Near Danville
Our Danville customers aren’t the only ones in the San Ramon Valley. We run daily routes through San Ramon, Clayton, Alamo, and Dublin. If you’re a few minutes outside Danville and your furnace is down, call us anyway. If you want to see the full scope of our heating work across the region, visit our Furnace Repair page.
Serving Danville, CA - Our Local Coverage Area
We’re based in the Danville 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 Danville
If your furnace is under 12 years old and the failed part is isolated, like an ignitor, capacitor, or pressure switch, repair is almost always the right call. If the heat exchanger is cracked, or the unit is over 15 years old and the repair bill would run more than a third of a new system, replacement starts to make more sense. In Danville, where temperature swings and varied elevations push furnaces harder than flat, uniform suburbs, we factor in how well the existing unit matches your home’s actual heating load before we recommend either direction. Call (361) 306-9515 and we’ll give you straight numbers.
Short-cycling in Danville’s foothill homes is usually caused by an oversized furnace paired with undersized return ductwork, the result of a prior installer skipping a proper load calculation. The furnace fires, hits the setpoint too fast, and shuts down before the house is evenly warmed. One February call in the Diablo foothills had a homeowner’s Carrier furnace short-cycling on the coldest mornings; our tech traced it to an oversized unit fighting a low static pressure return, confirmed with a load calculation, and dialed in the blower motor speed and thermostat calibration instead of just swapping parts.
Most furnace repairs in Danville run $150 to $700. A hot surface ignitor replacement typically lands $150 to $300. A gas valve replacement can run $300 to $500 installed. A blower motor job may reach $500 to $700. The written price you get before we start is what you pay, and the repair is guaranteed for a full year. Call (361) 306-9515 for a free estimate.
SEER2 is a cooling efficiency metric, but if you’re deciding between repairing a furnace and replacing it, the furnace-side numbers are AFUE and the system’s matching to your home’s heating load. In Danville, where the Diablo foothills and valley floor swing temperatures differently by elevation and even by street, a proper Manual J load calculation matters more than any efficiency rating label. A high-efficiency furnace that’s oversized for your ductwork will still short-cycle and waste fuel. We size replacement systems by the numbers, not by what the last unit was.
Yes. If your Danville home uses a heat pump as the primary heat source, we repair it the same way we repair furnaces: written price first, repair guaranteed in writing for a year. Heat pump repairs in Danville run $150 to $650 for most jobs. The key difference is that heat pumps cycle year-round here, so wear concentrates in the reversing valve, defrost board, and contactors. Down off Sycamore Valley Road, a Rheem furnace with a weak capacitor and a failing igniter cycled on and off. A quick test and a two-part fix, no replacement needed. Call (361) 306-9515 for a diagnosis.
We serve every neighborhood in Danville, including Blackhawk, Greenbrook, Magee Ranch, and the homes along Diablo Road near Mount Diablo State Park. Our technicians know the town well enough to route from Sycamore Valley Road to Camino Tassajara without GPS guesswork. If you’re in Danville and your furnace is down, we’ll get there the same day you call in most cases. Live phone support is staffed 24/7 at (361) 306-9515.
If the repair fails within the full-year guarantee period, we return at no charge. That’s the 365-Day Done Right Promise, and it applies to every furnace repair we do in Danville, no exceptions. If the repair doesn’t hold, we fix it. If it fails repeatedly, we’ll tell you straight that the root cause is something else and we’ll address that instead of selling you the same repair twice.
Get Your Danville Furnace Fixed Today
If your furnace is down in Danville, call (361) 306-9515 now. A live person answers. We’ll give you a window we keep, a written price before any work starts, and a full-year guarantee on the repair. The estimate is free, the diagnosis is honest, and the work is done by a uniformed, background-checked technician who knows Danville’s systems and streets. That’s not a promise. That’s the Garrison Standard.
Written by Marco Benitez, Owner at Dalton Heating & Air, serving Danville since 2003.