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 South El Monte, CA
Dalton Heating & Air handles HVAC work across South El Monte, where most homes were built between the 1940s and 1970s and still run original or heavily retrofitted heating and cooling systems. The combination of aging tract housing, tight crawl spaces, and inland San Gabriel Valley heat means repairs here rarely follow a textbook pattern. We show up with written pricing, factory-trained technicians, and a full-year guarantee on every repair. Call (626) 657-5344 and a live person answers, 24/7.
Why South El Monte Homes Are Different
South El Monte’s housing stock is predominantly single-story stucco and wood-frame construction from the 1940s through the 1970s. A lot of these homes still have their original gravity furnaces or early forced-air systems, and many were retrofitted over the years with window units, wall units, or package units bolted onto the roof. Insulation is often minimal, and attic ventilation is frequently inadequate. That matters because South El Monte sits inland in the San Gabriel Valley, where summer highs regularly exceed 95°F. The urban heat island effect pushes cooling loads well past what these systems were designed to handle when they were installed half a century ago.
We also see a patchwork of add-ons and conversions that reflect the city’s working-class roots. On a single residential block, one house may still run a floor furnace, the next has a package unit, and a third has been converted to a split system with questionable ductwork. Along Garvey Avenue, commercial shops often run oversized rooftop units that fail during the first sustained heat wave. Technicians here need to be comfortable in tight crawl spaces, working around outdated duct runs, and diagnosing systems that have been modified by several different hands over the decades. Winter nights can dip into the 40s, so heating has to work, but freeze risk is low, which means furnace failures are more about aging heat exchangers and worn blowers than burst pipes.
Styles & brands we work with




Our Main South El Monte Services
Most South El Monte homeowners call us for two things: a cooling system that quit during a heat wave, or a furnace that will not light on a cold winter morning. Each service has its own page with pricing and specifics.
AC Repair in South El Monte
When an air conditioner fails in South El Monte in July, the indoor temperature climbs fast. Homes with minimal insulation and poor attic ventilation can hit 90°F indoors by mid-afternoon. Our technicians diagnose the fault, put the repair price in writing before any work begins, and carry common parts for major brands on the truck. We see refrigerant leaks, failed capacitors, and dead compressors most often on the older systems common in this city. A refrigerant recharge, topping off the cooling fluid your system needs to reach set temperature, is a frequent fix on 15-year-old units. Read more on our AC Repair in South El Monte page.

Heat Pump Installation in South El Monte
Heat pump installation in South El Monte makes sense for homeowners replacing aging window units or converting from an old furnace-only setup. A heat pump handles both heating and cooling, which fits the local climate: hot summers and mild winters with nights in the 40s. The work involves a load calculation to size the unit correctly for a 1950s stucco home with minimal insulation, plus duct evaluation if existing runs are undersized. We provide a written fixed price and a set install date before the job starts. Details are on the Heat Pump Installation in South El Monte page.

Furnace Repair in South El Monte
Most furnace repairs in South El Monte involve systems that have run for 20 to 40 years. Original gravity furnaces and early forced-air units have heat exchangers, thermocouples, and blower motors that wear out. On winter nights when the temperature drops into the 40s, a failed furnace is a genuine health risk for older residents and families with young children. We diagnose the problem, quote the repair in writing, and guarantee the work for a full year. If the repair fails within that year, we return at no charge. See Furnace Repair in South El Monte 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 South El Monte
We service Carrier, Trane, and Goodman equipment, among other major brands. Our technicians are factory-trained on nine residential HVAC brands, and we stock common South El Monte replacement parts locally so repairs do not stall waiting on a shipment. Our brands page lists which systems we cover.
See the difference
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After
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AfterPricing for HVAC Company in South El Monte, CA
| Service | Typical range in South El Monte |
|---|---|
| AC Repair | $150 – $650 |
| Furnace Repair | $150 – $700 |
| AC Installation | $3,500 – $7,500 |
| Tune-Up | $80 – $200 |
What pushes a job toward the top of these ranges in South El Monte is usually the condition of the system and the access. A 50-year-old furnace buried in a tight crawl space under a house on Durfee Avenue takes longer to service than a newer unit in a garage. The price is in writing before any work starts, on every job, without exception.
Neighborhoods We Serve in South El Monte
We cover the entire city of South El Monte, from the residential streets south of Garvey Avenue to the industrial corridor along the 60 Freeway and everything in between. Response time is typically same-day for AC repair calls during summer and next-day for furnace work in fall and winter.
- Garvey Avenue corridor
- Residential blocks south of Garvey
- Areas near South El Monte High School
- Streets bordering the Whittier Narrows
- Industrial zone near the 60 Freeway
Service Area – Cities Near South El Monte
Our crews serve South El Monte and the surrounding San Gabriel Valley communities. If you are just outside the city line, we also cover El Monte, CA, Rosemead, CA, Temple City, CA, and Monterey Park, CA. Dispatch and scheduling run through our Los Angeles office, with crews serving South El Monte locally.
Serving South El Monte, CA - Our Local Coverage Area
We’re based in the South El Monte 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 South El Monte
For AC repair calls during summer, we typically arrive the same day. Furnace calls in fall and winter are usually next-day. Call (626) 657-5344 and a live person schedules the visit, no voicemail queue.
Most repairs and maintenance do not require a permit. Full system replacements and some duct modifications do. We handle the permit paperwork for installations so you do not have to chase the city.
No. Our pricing is the same regardless of the day or time. The written quote you get before work starts is the price you pay.
Call (626) 657-5344 for a free estimate on any HVAC work in South El Monte.
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 South El Monte Customers Say
"Changed the filter size and added a better filter rack. Simple and useful advice."
- Rhonda C."Fixed our AC and the price was fair. Showed up a bit past the window, but he called ahead."
- Dennis R."Blower motor died on the coldest night. They had the part on the truck and had us warm again the same day."
- Sandy G.