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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HVAC work in Waltham means dealing with old New England housing stock, tight mechanical closets, and boilers or ducted systems that were installed decades apart. Dalton Heating & Air handles AC repair, furnace repair, and heat pump installation across the city with written pricing before any work starts, and a full-year written guarantee on every repair. If you need a Waltham HVAC crew that shows up on time and stands behind the work, call (361) 306-9515.
Why Waltham Homes Are Different
Waltham’s housing stock spans three centuries, and the HVAC work changes block by block. The South Side has dense rows of triple-deckers built before central air was common, so many homes run window units or minisplits retrofitted into attics and knee walls. The Warrendale and Cedarwood neighborhoods are mostly 1950s and 1960s ranches with original ductwork that was sized for heat only, not cooling. Over on Piety Corner, larger colonials and capes from the 1920s often have radiators and no ductwork at all, which is why heat pump installations there usually mean ductless wall-mounted units rather than tied-in air handlers. Moody Street’s commercial buildings sit above apartments with shared venting that inspectors look at closely. Winters in Waltham routinely bring single-digit nights, so furnaces here get worked harder than they would in a milder coastal town. Summers are shorter but humid, and when an old central AC unit fails in July, the humidity inside a 1920s frame house climbs fast. Add in Waltham’s permit process for mechanical upgrades and the reality of knob-and-tube wiring still present in some older homes, and you have jobs that reward a crew that has seen this before.
Our Main Waltham Services
Waltham homeowners call us most for three things: getting a failed AC unit cooling again, putting in a heat pump where there is no ductwork, and getting a furnace running when the temperature drops. Each service has its own Waltham page with pricing and details.
AC Repair in Waltham
Most Waltham AC failures we see in July and August are refrigerant leaks, failed capacitors, or clogged condensate lines, all common in systems that sit idle for nine months and then get asked to run all day. Houses on the South Side with older Carrier and Rheem units tend to fail at the run capacitor first. We stock common parts on the truck and write the price before any work begins. If you have a hot third floor and a unit that will not kick on, call us. We answer the phone with a live person, 24/7. AC Repair in Waltham
Heat Pump Installation in Waltham
Waltham homes built before central air often have no ductwork, which makes heat pump installation a different conversation. Ductless wall units or ceiling cassettes make sense in radiators-only houses on Piety Corner, while a ducted heat pump may work in a Warrendale ranch that already has sheet metal under the floor. Waltham also has utility rebates for efficient heat pump equipment, and we handle the paperwork. Heat Pump Installation in Waltham
Furnace Repair in Waltham
Waltham’s cold snaps send furnaces down hard, usually at the igniter, the flame sensor, or a clogged pressure switch tube. Older Goodman and York gas furnaces in Cedarwood and Warrendale ranches tend to need igniters replaced after a few thousand cycles. We carry common parts and make the repair call the same visit whenever possible. Every furnace repair comes with a written guarantee. Furnace Repair in Waltham
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 Waltham
Our techs work on all major residential equipment, including Rheem, York, Bryant, and Daikin, along with Carrier, Trane, Lennox, and others. We keep our brands parts stocked on the truck for common failures, so most Waltham repair calls are finished in one visit.
Pricing for HVAC Company in Waltham, MA
| Service | Typical range in Waltham |
|---|---|
| AC repair | $150 – $650 |
| Furnace repair | $150 – $700 |
| AC installation | $3,500 – $7,500 |
| Tune-up | $80 – $200 |
What pushes a Waltham repair toward the high end is usually access. Attic air handlers in cape-style homes, crawlspace furnaces, or units packed into a tight basement closet all add labor time. The price is in writing before any work starts, on every job, without exception.
Neighborhoods We Serve in Waltham
We run calls across Waltham every weekday and handle emergencies around the clock, including weekends and holidays. Most neighborhoods fall inside a 30-to-60 minute response window depending on time of day.
- South Side
- Piety Corner
- Warrendale
- Cedarwood
- Banks Square
Service Area – Cities Near Waltham
Beyond Waltham, we work in nearby communities including Belmont, MA, Lexington, MA, Newton, MA, and our sister location in Arlington, WA. If you’re on the Waltham line, give us a call and we’ll tell you straight whether we can get a truck to you.
Serving Waltham, MA - Our Local Coverage Area
We’re based in the Waltham 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 Waltham
Same-day service is usually available for calls placed before early afternoon, and we run emergency calls overnight and on weekends. Most Waltham neighborhoods are within 30 to 60 minutes of a truck. Call (361) 306-9515 and a live person will book the appointment.
Most equipment changeouts and heat pump installations in Waltham do require a mechanical permit, and we pull the permit for you when the job needs one. Repairs and tune-ups generally do not require a permit. We’ll tell you exactly what applies to your job before any work starts.
Yes, we cover all of Waltham, from the South Side up through Piety Corner, Warrendale, Cedarwood, and Banks Square. Homes on the edges of the city near Lexington, Newton, and Belmont are also within our normal service area. Call (361) 306-9515 for a free estimate, and we’ll confirm the schedule before you commit to anything.
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 Waltham Customers Say
"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."Blower motor died on the coldest night. They had the part on the truck and had us warm again the same day."
- Sandy G.