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.
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AfterHVAC Company in Lexington, MA
Dalton Heating & Air is the HVAC company Lexington homeowners call when a system quits on a 95-degree afternoon or a furnace won’t fire on a January morning. We arrive on time, put the price in writing before any work starts, and stand behind every repair for a full year in writing. If a furnace or AC unit is acting up in Lexington, call (361) 306-9515 and a live person answers, day or night.
Why Lexington Homes Are Different
Lexington’s housing stock runs older than most of Middlesex County, and that changes the work. A 1960s split-level on Marrett Road and a newer colonial off Lowell Street heat and cool differently, and the ductwork rarely matches what a modern condenser wants to push. We see a lot of retrofitted central air in homes that were built for radiators and window units. Tight closet mechanical rooms, older electrical panels, and finished basements that sealed away the duct runs all show up on service calls here.
Climate is the other factor. Lexington gets the full New England swing: humid high-80s in July and stretches below 20 degrees in February. That means AC systems sized on the edge fail on the hottest days, and furnaces get worked hard for months straight. Systems here need to handle both extremes, not one. We also work around Lexington’s historic district, where exterior condenser placement can require extra care with permits and setback rules. None of it is a mystery to us; it just has to be handled correctly the first time.
If you’re new to Dalton Heating & Air, the home page covers how we operate across every town we serve.
Our Main Lexington Services
Most days in Lexington, our crews are out on three types of jobs. Here is what each one looks like and what to expect.
AC Repair in Lexington
A dead AC in Lexington in July is a genuine emergency. We diagnose the problem, show you the written price before any work begins, and stock common parts on our trucks so most repairs are done same day. Lexington’s older homes often run R-22 systems that are being phased out, which can affect repair cost and parts availability. Our technicians are trained on both older and newer equipment. Get the full details on AC Repair in Lexington.
Heat Pump Installation in Lexington
Heat pumps are becoming a common replacement choice in Lexington because they handle both heating and cooling in one unit, and Massachusetts rebates make them more affordable than they were a decade ago. Correct sizing matters enormously in Lexington’s older homes, where insulation and ductwork vary by neighborhood. We’ll run the numbers, give you a fixed installation price, and schedule the work on a set date. See Heat Pump Installation in Lexington for pricing and process.
Furnace Repair in Lexington
When a furnace won’t ignite in a Lexington February, you need a technician who can get there fast and fix it right. We carry ignitors, flame sensors, pressure switches, and gas valves on our trucks, which covers a large share of furnace failures. Every repair is guaranteed in writing for a full year. If it doesn’t hold, we return at no charge. Read more about Furnace Repair in Lexington.
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 Lexington
Our technicians are factory-trained on nine major residential brands, including Rheem, Bryant, and Daikin. Common parts for those systems are stocked on our trucks or available same-day from local supply houses. Check the full list on our brands page.
Pricing for HVAC Company in Lexington, MA
Here are the ranges Lexington homeowners can expect. Every quote is written down before work starts, so the number you approve is the number you pay.
| Service | Typical range in Lexington |
|---|---|
| AC repair | $150 – $650 |
| Furnace repair | $150 – $700 |
| AC installation | $3,500 – $7,500 |
| Tune-up | $80 – $200 |
What pushes a repair toward the high end in Lexington is usually the age of the system and parts availability for older units. A failed compressor on a 20-year-old AC costs more than a capacitor replacement. Whatever the number, it goes in writing before the work starts, and it doesn’t change at the door.
Neighborhoods We Serve in Lexington
Our crews work all over Lexington, from the colonial-era streets near Lexington Center to the newer developments near the Burlington line. Typical response time across Lexington is same-day for emergency calls, with morning or afternoon arrival windows confirmed when you book.
- Lexington Center
- East Lexington
- Five Fields
- Merriam Hill
- North Lexington
Service Area – Cities Near Lexington
Dalton Heating & Air serves Lexington and the surrounding towns. If you’re nearby, we also cover Woburn, MA, Burlington, MA, Winchester, CA, and Arlington, WA. Dispatch and scheduling are coordinated from our Boston office; crews serve Lexington locally.
Serving Lexington, MA - Our Local Coverage Area
We’re based in the Lexington 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 Lexington
Same-day for most calls, including weekends. Emergency calls get priority routing to a Lexington-area crew. Call (361) 306-9515 and a live person answers 24/7, no voicemail queue.
Many replacements and installations in Lexington require a town permit, especially when exterior equipment like condensers is involved. Our team handles the permit paperwork as part of the job, so you don’t have to chase the town office.
Yes. Our crews cover the entire town, from Lexington Center to the Arlington and Burlington borders. If you’re inside Lexington, we can get to you today.
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 Lexington Customers Say
"Good communication, tidy, and disciplined work. Taped off the floor and wiped the unit down."
- Karen J."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.