How often should my AC be serviced in Waltham?

We recommend having your air conditioning system professionally serviced at least once a year, ideally in the spring before the cooling season begins. Regular maintenance extends the life of your AC unit, improves efficiency, and helps prevent costly breakdowns during the hottest days in Waltham. Call (978) 293-5770 to schedule your AC tune-up.

When should I replace my AC instead of repairing it?

Consider replacing your AC if it is more than 10–15 years old, requires frequent repairs, uses R-22 refrigerant (which is being phased out), or your energy bills keep climbing. Spencer Home Services provides free estimates on AC replacement in Waltham and can help you determine whether repair or replacement is the smarter investment.

How long does AC installation take in Waltham?

A standard central AC installation typically takes one day. More complex installations — such as ductless mini split systems with multiple zones or homes that need ductwork modifications — may take 1–2 days. Spencer Home Services handles all permits and inspections required in Waltham.

What size AC do I need for my Waltham home?

AC sizing depends on your home’s square footage, insulation, window placement, and other factors. An oversized unit short-cycles and wastes energy, while an undersized unit runs constantly without cooling properly. Spencer Home Services performs a Manual J load calculation to recommend the right size AC for your Waltham home — ensuring maximum comfort and efficiency.

What’s included in an AC tune-up from Spencer Home Services?

Our comprehensive AC tune-up includes checking refrigerant levels, cleaning condenser and evaporator coils, inspecting electrical connections, testing thermostat calibration, lubricating moving parts, checking drain lines, and verifying system performance. We serve Waltham and 60+ nearby communities.

How quickly can a cooling technician get to Waltham?

Same-day cooling service is available throughout Waltham and the surrounding communities.

Is Spencer a Mass Save contractor?

Spencer is a Mass Save HPIN contractor.

Middlesex County Cooling Specialists

Cooling Services in Waltham, MA

Name: Spencer Home Services
Price range: $$

Spencer provides AC repair and installation for homeowners in Waltham and across Middlesex County.

Call 978-293-5770 Book online

4.9 Google ratingPhones answered live 24/7

A boxed LG outdoor air conditioner on a dolly beside a Spencer van.

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Schedule Cooling Service

978-293-5770

Phones answered live 24/7
Office Mon-Fri 7am-4pm

Licensed & insured · MA #11868 · #4610PLC
4.9 Google rating
Family-owned in Peabody since 1982
Same-day service available. Ask when you call.

“Pasquale took care of my aging HVAC. He was punctual, professional, efficient and got my HVAC back in prime condition. Considering signing up for their annual service maintenance.”

Venki A., Google review, September 2026

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Serving Waltham

Google reviews from Spencer customers

4.9 Google rating

Read our Google reviews →

       
 Excellent4.91188 reviews
 4.9
 Excellent1188 reviews
  Write a review 
 
 
 
       Posted on Google  
  
 
   William Lepene 
 28 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +0
The whole team spencer, nick, made sure everything was good with my new furnace.  They replaced a 65yr old gas furnace with no issues
  
 
 
     Posted on Google  
  
 
   Adelaide Rhodes (AddeyR) 
 29 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +2
Thank you Stephen and Brian and team for helping me get my driveway paved. I appreciate your help with permitting and scheduling.

Adding an update now that I see how badly the light poles are damaged. I specifically told the people who came out to put forms around these lights and they didn’t do so and now look what has happened - more work. Companies should respect the homeowners when they make a specific request like this because there’s a good reason for it because in order to locate the electric electrical, I’m going to have to dig up the new asphalt. This is a real problem and the drainage is a little messed up as well.  Not so happy now.

Update: They sent out an electrician first thing and are going to locate a similar lamp and do the repair. Thanks guys!!! I really appreciate a company that stands by its work!!!!
  
 
 
     Posted on Google  
  
 
   L V 
 46 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +0
Spencer Home Services is great. From a very responsive customer call center to a timely technician visit, every step of this stressful process was made easy. Our water heater kicked out on us on a Friday afternoon heading into a Nor'easter weather weekend....ugh....we were up and running with a new system by 5pm. Cannot thank the technicians enough. Shane and Steve were competent, respectful, and efficient. Thank you. Highly, highly recommend Spencer Home Services!!
  
 
 
     Posted on Google  
  
 
   Ginny Colarusso 
 48 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +0
Pasquale was polite, personable & efficient. He did a great job with my service maintenance The old piping and hosing had deteriorated after five years. This will definitely last much longer.
  
 
 
     Posted on Google  
  
 
   Justin Repp 
 56 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +2
I needed a sewer line replaced on my property in Lowell. The issue was a complicated one but Will came out to assess the problem and gave me a fair price (much cheaper than another company!). Then the team of Oscar, Bryan, Paul, Julio, Cesar, and others came out and banged out the job in one (long) day. They crushed it. Highly recommend.
  
 
 
     Posted on Google  
  
 
   Patrick Proctor 
 61 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +0
We found a 75 year old sewer pipe starting to leak and crack at the joints. Spencer Home Services was extremely helpful in giving an estimate and getting it repaired quickly by a skilled plumber!
  
 
 
     Posted on Google  
  
 
   Courtney Landry 
 81 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +0
Thanks so much to Jesse & the entire Spencer team! From my first interaction, I was kept up to date and given the best advice on how to move forward with a water leak. The service was professional, efficient, and a pleasure. I am a repeat customer and would gladly recommend Spencer Home Services to anyone. Thank you!
  
 
 
     Posted on Google  
  
 
   Mason Gohl 
 84 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +1
Jesse was great.  He showed up and got the job done.  SPH was very communicative which meant no worries!  Very happy.
  
 
 
     Posted on Google  
  
 
   Ryan Penney 
 101 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +2
I Called Spencer yesterday with a sewer issue at my Clients home. They came out, assessed the job. Laid out all the options to the client. Had a price back in less than an hour. Client accepted the price, signed the contract, and the job was completed Today by 3:00. Professionals from the beginning and all the way through until the end.
  
 
 
     Posted on Google  
  
 
   Weihai Chen 
 118 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +1
I had an excellent experience with Spencer Home Services replacing my main water line — nearly 200 feet long! The crew worked efficiently and managed to finish everything within a single day, which was very impressive.

The pricing was great, and the team went above and beyond with the cleanup and grading afterward — the yard looked neat and well-restored when they were done.

Special thanks to Bryan Paul, Julio, Brian, Oscar, and Cesar for their professionalism, hard work, and attention to detail. I highly recommend Spencer Home Services for anyone looking for reliable and high-quality service!

---------------
7/16/26
Great company, actually stands by their warranty!

Spencer Home Services put in a new main sewer line for me last August. Over the winter, the street patch settled a bit and started turning into a pothole. I called them up to see if they’d fix it under their warranty, and they were awesome about it.

First, they sent someone out two weeks ago to run a camera down the whole pipe. They wanted to make sure the shifting dirt didn't cause any sagging or bellies underground, and they did the inspection with absolutely no pushback or extra fees.

Once we confirmed the pipe was in perfect shape, they scheduled a crew to come back today to fix the road. They cut a clean square and put down a really solid, hot asphalt patch that's completely level with the street.

It's rare to find a company that actually stands by their work and coordinates everything without a fight. Highly recommend them!
  
 
 
     Posted on Google  
  
 
   Steven Murphy 
 132 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +3
I had two projects done at my property. One was reline my sewer line and install a line for a basement half bathroom. The other was replacing my hot water storage tank. The worker quality was excellent, the only problem I had was finding the offices to pay off the work
  
 
 
     Posted on Google  
  
 
   karen mancuso 
 141 days ago
 
 
 Trustindex verifies that the original source of the review is Google.  +0
I had 2 mini split systems installed in my townhome on the second and third floors. The work was done carefully and with good attention to details both outside and inside by Charles Barragan and John Sacharczyk.
They provided thorough instruction with demonstrations on how to operate the systems with a remote regarding all modes, options etc . I am extremely pleased with the service from Spencer Home Service from estimate to completion. Charles and John provided  high quality work and were in a pleasure to work with.
  
 
 
 
 
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Services We Offer in Waltham

Repairs & Maintenance

Not cooling, low refrigerant, or an annual tune-up.

Installation & Replacement

New systems, mini-splits and replacements.

Why homeowners choose Spencer

Family-owned, locally operated
A Peabody family business since 1982.
Phones answered live 24/7
Office Mon-Fri 7am-4pm.
Options and pricing first
You receive options and pricing before work begins, and you choose which work to approve.
Lifetime workmanship warranty
For the typical lifespan of the installation. Terms apply.
Licensed & insuredMA #11868 · #4610PLC
One local teamPlumbers, HVAC technicians and electricians
Free replacement estimatesFor installations and replacements

Call 978-293-5770 Book online

See warranty details →

Waltham systems & permits

Waltham's City Code Sec. 13-2(b)(9) sets a flat $25 electrical permit fee specifically for "air conditioners," issued by the Inspector of Wires.
NOAA's 1991-2020 climate normals (versioned normals-annualseasonal-1991-2020 dataset) for station USC00190535 (Bedford, MA, elev. 160 ft, ~8 miles northwest of Waltham) show an annual average temperature of 49.6°F, 639.1 annual cooling-degree-days, and 6,206.9 annual heating-degree-days.
Waltham's zoning ordinance (Dimensional Requirements, Ch. Z) requires that mechanical equipment located on the roof of qualifying buildings be "selected and screened to reduce visual and noise impacts on residence districts" / "abutting residence districts."
Utility gas heats 53.7% of occupied homes in Waltham (13,813 of 25,721 households, ACS 2019-2023 5-year).

Sources:

ecode360.com

ncei.noaa.gov

data.census.gov

76

days above 80°F, in an average year

What summer actually asks of a system in Waltham

Waltham gets about 76 days above 80°F in a year, and only about 15 above 90°F. That short, concentrated peak is exactly why an oversized air conditioner works badly here: it cools the air quickly, then shuts off before it has pulled the humidity out, leaving the house cold and clammy.

NOAA 1991–2020 Climate Normals, recorded at Hanscom Field in Bedford — the nearest reporting station, about 7 miles away.

Common questions

Cooling FAQs in Waltham

How often should my AC be serviced in Waltham?
We recommend having your air conditioning system professionally serviced at least once a year, ideally in the spring before the cooling season begins. Regular maintenance extends the life of your AC unit, improves efficiency, and helps prevent costly breakdowns during the hottest days in Waltham. Call (978) 293-5770 to schedule your AC tune-up.
When should I replace my AC instead of repairing it?
Consider replacing your AC if it is more than 10–15 years old, requires frequent repairs, uses R-22 refrigerant (which is being phased out), or your energy bills keep climbing. Spencer Home Services provides free estimates on AC replacement in Waltham and can help you determine whether repair or replacement is the smarter investment.
How long does AC installation take in Waltham?
A standard central AC installation typically takes one day. More complex installations — such as ductless mini split systems with multiple zones or homes that need ductwork modifications — may take 1–2 days. Spencer Home Services handles all permits and inspections required in Waltham.
What size AC do I need for my Waltham home?
AC sizing depends on your home’s square footage, insulation, window placement, and other factors. An oversized unit short-cycles and wastes energy, while an undersized unit runs constantly without cooling properly. Spencer Home Services performs a Manual J load calculation to recommend the right size AC for your Waltham home — ensuring maximum comfort and efficiency.
What’s included in an AC tune-up from Spencer Home Services?
Our comprehensive AC tune-up includes checking refrigerant levels, cleaning condenser and evaporator coils, inspecting electrical connections, testing thermostat calibration, lubricating moving parts, checking drain lines, and verifying system performance. We serve Waltham and 60+ nearby communities.
How quickly can a cooling technician get to Waltham?
Same-day cooling service is available throughout Waltham and the surrounding communities.
Is Spencer a Mass Save contractor?
Spencer is a Mass Save HPIN contractor.

Cooling service in Waltham and nearby towns

We serve Middlesex County, the Merrimack Valley and nearby towns.

See the full service area →

Other Spencer Services in Waltham

One company for the whole house.

Plumbing Services in WalthamLeaks, water heaters, fixtures and repiping.Heating Services in WalthamFurnaces, boilers and heat pumps.Electrical Services in WalthamPanels, wiring, EV chargers and generators.Drain & Sewer Services in WalthamDrain clearing, camera inspection and no-dig repair.