Furnace & heating
AC repair
Ductless mini splits
TraneSeasonal 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.
Get your free estimateHVAC Company in Duarte, CA
Duarte sits hard against the San Gabriel Mountains, and that geography shapes nearly every HVAC job here. Homes in the northern foothills take brutal afternoon sun that pushes cooling systems far harder than the square footage suggests, while older 1950s and 60s tract homes throughout the city were built for a California that no longer exists. We’re a Garrison Partners company held to The Garrison Standard since 2003: written pricing before any work starts, background-checked technicians, and a full-year written guarantee on every repair. If your system is struggling, call (626) 657-5344 any time, day or night. A live person answers.
Why Duarte Homes Are Different
Most of Duarte’s housing stock went up in the 1950s and 60s, and the forced-air systems installed then were sized for milder summers and fewer heat waves. The ducts are the weak link. Original galvanized ductwork from that era leaks, rusts, and often can’t move enough air for a modern system. In neighborhoods like Las Lomas, where hillside runoff keeps crawlspaces damp, that corrosion accelerates. We regularly open up a return plenum in a Las Lomas home and find the ductwork has rotted through in three places.
The hillside homes north of Huntington Drive bring their own set of problems. Access for equipment replacement is tight, sometimes requiring a crane or hand-carrying a condenser up a steep slope. Santa Ana wind events push temperatures above 100°F for days at a stretch, and the dry, dusty air clogs filters fast and coats condenser coils. A system that gets marginal maintenance will fail in August, not in the mild months when it’s easy to schedule. That’s the pattern we see year after year in Duarte.
Styles & brands we work with
Our Main Duarte Services
Duarte homeowners call us most often for two things: cooling that has quit in the middle of a heat wave, and heating systems that need major work or replacement. Each service has its own page with detailed pricing and what to expect.
AC Repair in Duarte
When an air conditioner fails during a Santa Ana stretch, the problem is usually one of a handful of things: a failed capacitor, a refrigerant leak, a clogged coil, or a blower motor that has burned out. In Duarte, dust from the foothills and nearby alluvial fans compounds all of these. We diagnose the exact fault, put the repair price in writing before any work begins, and guarantee the repair in writing for a full year. Most repairs in Duarte run from $150 to $650 depending on the part. See the full breakdown on our AC Repair in Duarte page.
Heat Pump Installation in Duarte
A heat pump makes particular sense in Duarte, where winters are mild but summers are punishing. One system handles both, and modern inverter-driven units hold temperature steady through 100°F afternoons without the short-cycling and humidity problems older single-stage units have. The catch in Duarte is the older home: many 1950s and 60s houses need duct upgrades or sealing before a new heat pump will perform to spec. We factor that in up front so the price you sign matches the work. Details and options are on our Heat Pump Installation in Duarte page.
Furnace Repair in Duarte
Duarte’s wet winters pull moisture into crawlspaces and garages, and that hits furnaces hard. Rusted flame sensors, corroded control boards, and cracked heat exchangers are common finds, especially in older units that have never had regular service. Carbon monoxide risk is real with a cracked heat exchanger, so we test every furnace we touch. Most furnace repairs run $150 to $700 depending on the part. The repair is guaranteed in writing for a full year; if it fails in that time, we return at no charge. See our Furnace Repair in Duarte page for specifics.
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 Duarte
Our technicians are factory-trained on nine major residential brands, including Carrier, Trane, and Lennox. We stock common parts locally for faster turnaround on Duarte jobs. For a fuller picture of what we work on, see our brands.
See the difference
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After
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AfterPricing for HVAC Company in Duarte, CA
| Service | Typical range in Duarte |
|---|---|
| AC Repair | $150 – $650 |
| Furnace Repair | $150 – $700 |
| AC Installation | $3,500 – $7,500 |
| Tune-Up | $80 – $200 |
What pushes a Duarte repair toward the top of that range is usually access. Hillside condensing units that take two technicians forty minutes to reach cost more to service than a pad unit in a flat backyard on Royal Oaks Drive. The price is always in writing before work starts, on every job, without exception.
Neighborhoods We Serve in Duarte
We work across all of Duarte, from the flat mid-city blocks to the hillside homes that climb toward the mountains. Typical response time across the city is same-day for urgent cooling calls during summer.
- Las Lomas
- Royal Oaks
- North Duarte foothills
- Mountain Vista
- Central Duarte
Service Area – Cities Near Duarte
We also serve homeowners in the surrounding San Gabriel Valley communities. If you’re in Monrovia, CA, Arcadia, CA, Sierra Madre, CA, or Temple City, CA, the same written-pricing and full-year guarantee applies.
Serving Duarte, CA - Our Local Coverage Area
We’re based in the Duarte 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 Duarte
During summer heat waves, we prioritize cooling failures and typically arrive the same day. Calls are answered by a live person 24/7, and you’ll get a specific arrival window, not an open-ended “sometime today.”
Most replacements and installations do require a permit, and we handle that paperwork as part of the job. The process is typically straightforward, but we’ll tell you exactly what applies before work starts.
Yes, we cover the full city, including the hillside neighborhoods where access for equipment replacement is tight. Dispatch and scheduling are coordinated from our Los Angeles office, and crews serve Duarte locally. Call (626) 657-5344 for a free estimate.
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 Duarte Customers Say
"Blower motor died on the coldest night. They had the part on the truck and had us warm again the same day."
- Sandy G."Thermostat swapped for a programmable one and ducts checked for leaks. The house is more even now."
- Omar H."Good communication, tidy, and disciplined work. Taped off the floor and wiped the unit down."
- Karen J.