Furnace Repair Near Lexington, MA

$99 Furnace Repair Diagnostic

$89 Furnace Repair Diagnostic

$79 Furnace Repair Diagnostic

$99
Regular Price
$99
$89
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Regular Price
$99
$79
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Noticing strange sounds, weak airflow, or rising energy bills? See the full list of hidden HVAC warning signs before it’s too late ↓

Furnace Repair Near Lexington, MA

(508) 443-6451
(508) 443-6452
(508) 443-6453
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Furnace Repair in Lexington with Honest, Fair Pricing

Our licensed technicians bring deep experience, ongoing training, and the right tools to every call. We arrive prepared and respect your home and time. In most cases, we complete your furnace repair on the first visit.

We are transparent from start to finish. Before any work begins, your technician explains the problem, reviews all options, and provides clear, upfront pricing. We service most equipment brands, and every job is backed by our satisfaction guarantee.

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SumZero Energy Systems is Here for All of Your Furnace Repair Needs in Lexington, MA!

  • Fully Stocked Trucks — most fixes completed on the first visit
  • Friendly Professionals — courteous, respectful, and on time
  • Fully Licensed & Insured — work you can trust
  • Same Day Service Available — fast help when you need it
  • 100% Satisfaction Guarantee — we stand behind every repair
  • Complimentary 2nd Opinions — confidence before you commit

We’re here to help with Furnace Repair in Lexington, MA, and we’re proud to provide professional, local service you can count on. Whether it’s an urgent issue or routine repair, our team is ready to get your heat back on quickly and reliably.

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Top-Quality Heating and Cooling Services Near Lexington, MA

Call Today for Your Furnace Repair!

Reliable, High-Quality Furnace Repair That Restores Comfort Fast

Furnace Repair and Lexington MA’s Trusted Heating & Cooling Professionals — Your Local Experts

When your furnace falters, SumZero Energy Systems responds quickly with a precise diagnostic process to pinpoint the root cause and restore heat. Our certified technicians check airflow and filters, test igniters and flame sensors, inspect heat exchangers, verify gas pressure, calibrate thermostats, assess blower motors and control boards, and perform full safety checks. We resolve common issues such as no heat or weak heat, short cycling, uneven temperatures, frequent shutdowns, unusual noises, ignition failures, clogged filters, dirty burners, worn belts, and thermostat malfunctions—then complete repairs with quality parts and craftsmanship. Beyond furnace repair, we offer complete HVAC solutions: replacements and installations, seasonal tune-ups and maintenance plans, boiler service, heat pump and air conditioning repair, ductwork design and sealing, indoor air quality improvements, smart thermostat setup, and 24/7 emergency service—delivered with clear options, upfront pricing, and exceptional service. Trust SumZero Energy Systems for reliable results, responsive communication, and quality craftsmanship, proudly and professionally serving the Lexington, MA area.

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Furnace Repair in Lexington

Recognize the signs and risks

Noticing unusual performance? Review the common signs and risks that can signal your system needs attention. Early action helps prevent breakdowns and higher costs. If any sound familiar, count on SumZero Energy Systems for prompt, professional Furnace Repair in Lexington.

Unpleasant odors from vents

Sign

Accumulated dust, mold, or a gas leak in the system.o Risks: Exposure to poor air quality or potential health hazards from gas leaks.

Risk
Estimated Time for Diagnostic:
30-45 minutes

Uneven heating in rooms

Sign

Leaky ducts, insufficient insulation, or a failing blower fan.

Risk

Cold spots in your home can create discomfort and force overuse of your system, reducing its lifespan.

Estimated Time for Diagnostic:
60 minutes

Frequent cycling on and off

Sign

Faulty thermostat, dirty sensors, or short-cycling due to overheating.

Risk

Increased energy bills and unnecessary wear and tear on the system, leading to costly repairs.

Estimated Time for Diagnostic:
45 minutes

Furnace not producing heat

Sign

Malfunctioning thermostat, clogged filters, or ignition failure.

Risk

Risk of frozen pipes and dangerously cold indoor temperatures, especially for children or elderly family members.

Estimated Time for Diagnostic:
45–60 minutes

Noisy furnace operation

Sign

Loose or damaged components, such as a failing blower motor or dirty burners.

Risk

Noise can signal mechanical failure, leading to a complete system breakdown and leaving your family without heat during the coldest months.

Estimated Time for Diagnostic:
45–60 minutes

Schedule a Comprehensive Home Furnace Repair Near You in Lexington, MA

Is your home’s heating system acting up? Trust SumZero Energy Systems for reliable repair services near you. Schedule your appointment today and get expert help on the way!

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Frequently Asked Questions About Furnace Repair

Have questions about keeping your home warm and safe? You’re not alone—many homeowners do, and SumZero Energy Systems is here with clear, trustworthy answers to help you make confident decisions.

Why trust SumZero for furnace repair?
We’re a local, highly rated team committed to honest work, fast service, and keeping your home safe and warm—all backed by our satisfaction guarantee.
How long does a typical furnace repair take?
Most repairs take 30 to 90 minutes. We’ll assess the issue and let you know upfront what to expect in terms of timing and cost.
Do you repair all furnace brands and models?
Yes. Our technicians are experienced with a wide range of gas, electric, and high-efficiency furnace systems.
How quickly can I schedule a furnace repair appointment?
We offer fast scheduling and do our best to fit you in the same day or next, especially during high-demand heating seasons.
Is it dangerous to run a broken furnace?
It can be. Issues like gas leaks or carbon monoxide can pose serious risks. It’s best to shut off your furnace and call us immediately for inspection.
What if my furnace is more than 15 years old?
If your furnace is over 15 years old and repair costs are high, we may recommend replacement. We'll guide you through your best options with no pressure.
Can you fix my furnace during the same visit?
In most cases, yes. Our trucks are stocked with common parts and tools to complete many repairs on the spot.
What’s included in your $99 furnace diagnostic visit?
Our technician inspects your furnace, checks key components, identifies the issue, and provides a detailed explanation and estimate before any work begins.
Do you offer emergency furnace repair services?
Yes. We offer emergency repairs to restore heat quickly—especially during cold Massachusetts winters when safety is a priority.
What are the signs my furnace needs repair?
Unusual noises, inconsistent heat, a sudden increase in energy bills, or the furnace cycling on and off frequently are common signs your furnace may need repair.