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Find Thermostat installers and replacers in Chelmsford

Avatar for Wotton Heating
Wotton Heating
5.0(
23
)

Serving Chelmsford, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Gas furnace hot water heat needed more output. They replaced a few parts and it is working great. . very responsive and Robert is as knowledgeable as they come ."
oil burner cleaning
Roth oil tank
Burnham Boiler /tankless
Biasi Boiler
Mitsubishi

+1

Response time1 day
29 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Doug Anderson Plumbing & Heating
Doug Anderson Plumbing & Heating
4.8(
34
)

Serving Chelmsford, MA and surrounding areas

Approved

In business since 2014

Emergency services offered

Small jobs welcome

"Doug Anderson was great to work with. His bid for the work was in line with other bids for the same system, but he took care of every aspect of the job (Oil tank removal, arranging electrical work, inspections, cement repair, additional thermostat, etc..) The boiler install went smoothly and system works well for us. Replacing a boiler is a big job, and it mattered a lot to have someone do the job with such care and consideration."
Toilet
Stand in Shower with diverter and hand held
Stand in Shower with diverter and hand held
Vessel Sink
Toilet

+26

Response time1 day
Recommended by85%of homeowners
Avatar for Milltown Plumbing, Heating, Cooling and Electrical - HVAC
Milltown Plumbing, Heating, Cooling and Electrical - HVAC
4.5(
312
)

Serving Chelmsford, MA and surrounding areas

Approved

In business since 1979

Warranties offered

Small jobs welcome

"Hello Everyone! I'd like to give Milltown a shout out for installing our new HTP Combo unit. I'd like to especially thank Garret, Brandon, and Kat for pulling the whole thing together and making the installation as seamless as possible. Also, shout out to HTP for replacing a defective unit. They stood up and did the right thing when they didn't have to. Milltown went above and beyond what a plumbing company would typically do. When our combo unit failed, we lost heat and hot water. Milltown was able to hook up a temporary hot water tank so my family had access to heated water for showering, dishes, etc. Everyone I spoke to were genuinely concerned and could not have been more professional in their workmanship, cleanliness, and finished product. I am very pleased with everything from start to finish."
The Milltown Team
Family Owned and Operated
We're Ready When You Need Us
Our Mission
Team Photos

+13

Response time9 hrs
Recommended by89%of homeowners
Avatar for Elemental Heating & Cooling
Elemental Heating & Cooling
5.0(
11
)

Serving Chelmsford, MA and surrounding areas

Approved

In business since 2020

Warranties offered

Offers commercial services

"Scott did a fantastic job. Inducer motor was not working in my carrier infinity furnace. He fixed it without me needing to replace the expensive motor. He is good in communication and explained my questions patiently and effectively."
Mini Split Run Up To Finished Attic
Mini Split Zone
Mini Split Outdoor Unit
Response time6 hrs
1 neighbors recently requested a quote
Recommended by90%of homeowners
Chambers Heating & A.C. Service
4.8(
45
)

Serving Chelmsford, MA and surrounding areas

Approved

In business since 1992

Free estimates

Emergency services offered

"Our oil burner cracked and needed to be replaced. The burner heats our water, so we would be without hot water until we replaced the burner. Steve Chamber arrived quickly, provided a competitive quote and got the oil burner installed and our hot water restored within a few days.. The final bill was exactly what was quoted and they cleaned up after themselves, even removing the cardboard boxes. I highly recommend Chamber HVAC and love that it is a family owned and operated business!"
93% High Efficiency Gas Furnace with AC
Baseboard Zone on a Steam Boiler
Supply Header with Circulators
Before Pic w/zone valves & Loose Wiring
Gas Fired tankless water heater

+6

4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Carmen Colella Electric
Carmen Colella Electric
4.8(
49
)

Serving Chelmsford, MA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Carmen and his team did a great job on helping me upgrade my panel as well as change my meter box. I also had an old wooden mast that they changed out and replaced with a much nicer modern fixture which was great. My house was old and I actually bought it many years ago as a forclosure renovation. So some of the previous work was old and not done correctly. Carmen, Shawn and his team were great to work with. I was worried that no one would take the job because the previous owner had not done a great job. Carmen and his team dived in and made all of the main wiring to the house beautiful and secure and safe. I would use them again for any electrical work big or small. In addition I would add his team comes very well prepared. They have every tool imaginable for the job and are ready to go. I am so happy I choose them. A local neighbor recommended him to me. I looked at their breaker panel and liked how neatly it was done. Thats why I choose Carmen."
Response time5 hrs
5 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for 1st Call Emergency Heating
1st Call Emergency Heating
5.0(
5
)

Serving Chelmsford, MA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Expert residential heating and air conditioning repair, maintenance, and install services with 24/7 after hours service for EMERGENCIES serving all cities and town within 2 hours of Quincy, MA. Tech will respond within 2 hours. Affordable after hours EMERGENCY service for no heat/ no hot water from 530pm to 3am. Non-Emergent service calls, repair, and maintenance offered before 530pm 7 days per week.

Boiler install
Boiler install
1 neighbors recently requested a quote
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FAQs for thermostat installation and replacement projects in Chelmsford, MA

Smart thermostats may be worth it for many homeowners. They come with various features, including voice control and smartphone apps. Vacation mode can help lower energy usage when you’re out of town for an extended period. Alert warnings let you know about major spikes or drops in temperature. Smartphone apps can track energy usage, and smart thermostats can learn your routine over time to adjust your temperature and reduce wasted energy consumption automatically.

You typically do not need more than one smart thermostat. While it’s common to see multiple mechanical thermostats throughout a large home, multiple smart thermostats may try to override each other. This can lead to problems with the HVAC system. Ensure the unit you buy has the option for dual- or multi-zoned systems to avoid compatibility issues.

Installing a programmable or smart thermostat may save you $180 per year in utility costs. A big part of this comes from a smart thermostat’s ability to learn and adapt to your regular routines. With smartphone apps or web-based interfaces, you also have the option to control your thermostat when you’re not home.

The Chelmsford, MA homeowners’ guide to thermostat installations and replacements

From average costs to expert advice, get all the answers you need to get your job done.