Marlborough, MA

Electrician & HVAC Contractor in Marlborough, MA

Reliable 24-Hour Emergency AC & Heating Repair, Installation & Maintenance 

Since 1944, Cotti-Johnson has specialized in the installation, maintenance, and service of residential air conditioning and heating systems.

Our decades of experience and dedication to customer service qualify us to represent the premier manufacturers in the industry—American Standard, Bosch, Bryant, and Mitsubishi Electric.

We also have highly trained electricians in Marlborough and offer the complete line of Honeywell-Generac stand-by home generators.

HVAC Services in Marlborough

As a family-owned business that’s been around for decades, we pride ourselves on our full range of heating, air conditioning, and indoor air quality services. And, because HVAC problems often occur outside of normal operating hours, we offer after-hours service and same-day repairs. When we say we’re here for you, we mean it! 

Our HVAC services include but are not limited to: 

  • Boilers 
  • Cooling towers 
  • Condenser loops 
  • Ductwork 
  • Gas, oil, and electric furnaces 
  • General building and mechanical services 
  • Heat pumps
  • Pipe and gas fittings 
  • Sheet metal fabrication 
  • Water heaters 

Electrical Services in Marlborough 

Have you noticed a buzzing sound coming from an appliance? Experienced flickering lights or electrical outlets that are warm to the touch? These are subtle warning signs that it’s time to call an electrician. Cotti-Johnson has been providing residential and commercial electrical services in Marlborough since 1944, from running new electrical writing in your space to upgrading existing electrical panels. If you need professional electrical services, we’re here to help. 

Our electrical services include: 

  • Rewiring 
  • General inspections 
  • Electrical panel upgrades 
  • Repairs, installations, and upgrades

Call (774) 768-5154 or contact us online to schedule fast & dependable service with our electricians or HVAC contractors in Marlborough, MA.


Water Heater Services in Marlborough

Cotti-Johnson can repair, replace, or install a new water heater in your home or business. We service all water heater brands and models, including both tank and tankless systems. 

If you’re looking to install a new water heater, or replace an existing one, we can advise you on the best make and model for your needs. Reach out today for more information. 

Contact Cotti-Johnson for a Free Estimate 

At Cotti-Johnson, we've been delivering comfort to homes and businesses in Marlborough and surrounding areas for decades. Throughout this time, our commitment to customer satisfaction has remained the same. We are here for you: yesterday, today, and tomorrow.

To request a free estimate or schedule service, call us at (774) 768-5154 or complete an online contact form. A member from our team will be in touch shortly.

Learn What We're Doing for Your Home in Every Season
See Our Services to Learn How We Can Help You

Why Cotti-Johnson?

Learn why our team of experts is the best choice for all your heating, cooling, electrical, and water heater needs.
  • Service On Time
  • Warranties on Parts & Labor
  • Customer Satisfaction Guaranteed
  • Family Owned & Operated
  • Honest Pricing
  • 70+ Years of Experience
Make Cotti-Johnson Your First Choice!

Our team is committed to providing you with solutions for any HVAC, Electrical, or Water Heater problem you may be experiencing.