Don’t go for a general mechanic. Go to the company that’s an authorized dealer of Lennox products.
For years, Dave Whitaker relied on a mix of old-school charm and aging technology to keep his Monroe home warm. His house, tucked deep in the evergreen trees outside town, had an old Lennox furnace—installed sometime in the ’90s—and a wood-burning stove he’d inherited from his father. When the temperature dropped, Dave would fire up the stove, not just for the rustic feel, but because the furnace was unreliable. Some nights, it wouldn’t start at all. Other times, it ran endlessly without really heating the house. “It’s got character,” Dave would say, half-joking as he hauled another load of firewood inside.
But after a particularly long and bitter winter—and a string of costly repair visits—Dave decided it was time. The old Lennox had served him well, but he was ready for something more efficient, more dependable, and less smoky. Still, he didn’t want to switch brands. That furnace had lasted nearly 30 years, and to Dave, that kind of longevity meant something. He called up Fast HVAC contractor and ordered a new Lennox high-efficiency furnace. The installation was smooth, and for the first time in decades, Dave didn’t have to rely on the wood stove just to stay comfortable. The new system kept the entire house evenly heated, quietly and efficiently. “I’ll still use the stove now and then,” Dave said, smiling as he stacked wood more out of habit than necessity, “but it’s nice to know I don’t have to.” With the new Lennox in place, winter no longer felt like a battle—it felt like home.
The history of Lennox furnaces dates back to 1895, when Dave Lennox, a blacksmith and inventor in Marshalltown, Iowa, revolutionized home heating by patenting and producing the first riveted steel furnace. This innovation was a major improvement over traditional cast-iron furnaces, offering better heat distribution and durability. That same year, he sold the furnace design and manufacturing business to local businessman D.W. Norris, who expanded the company under the Lennox name. Throughout the early 20th century, Lennox grew steadily, becoming a respected name in American heating systems by consistently delivering quality products and embracing technological advancements.
As the decades passed, Lennox became a pioneer in the HVAC industry, introducing high-efficiency gas furnaces and advanced temperature control systems well ahead of market trends. The company focused on energy efficiency, quiet performance, and innovative features—like variable-speed blowers and smart thermostat integration—that helped set its products apart. Today, Lennox furnaces are known for their precision engineering, long-lasting performance, and commitment to sustainability. With over a century of experience, Lennox continues to be a leading brand trusted by homeowners and HVAC professionals alike for reliable, cutting-edge home heating solutions.
Since 1982, our fully trained technicians have been servicing all brands of home heating equipment, including Lennox. We offer fast diagnostics, reliable repairs, and affordable pricing. With ready access to parts and deep familiarity with Lennox systems, we provide fast, expert solutions to keep your home warm and safe.
At Fast Heating & Air, we specialize in Lennox furnace sales, installation, and service, delivering reliable comfort solutions to Puget Sound homeowners year-round. As an authorized Lennox dealer, we provide a full range of high-efficiency furnaces known for their performance, durability, and quiet operation. Whether you’re upgrading an outdated system or installing a furnace in a new home, our experienced team will guide you through product selection to ensure the right fit for your space, budget, and energy goals.
Our technicians are Lennox-certified and trained to provide expert diagnostics, repairs, and routine maintenance on all Lennox furnace models. We take pride in fast response times, honest recommendations, and long-term customer relationships built on trust. Whether it’s a mid-winter emergency repair or a pre-season tune-up, Evergreen Heating & Air is committed to keeping your home warm, efficient, and worry-free with service you can count on.
It’s 15–20 Years Old. Most furnaces last 15–20 years. If yours is getting up there in age, it’s likely losing efficiency and may be nearing the end of its lifespan—even if it’s still running.
An older or failing furnace often runs longer and harder to heat your home, leading to higher utility costs.
If you’re calling a technician every season (or more), the repair bills can quickly add up. A new unit might save money in the long run.
Cold spots or inconsistent temperatures can indicate your furnace is no longer distributing heat properly.
Is your furnace turning on and off more often than it used to? This could signal mechanical issues or failing components.
Banging, popping, rattling, or squealing are signs of wear—and potential failure.
An older furnace may struggle to filter air effectively, leading to dust, dry air, or increased allergy symptoms.
A yellow or flickering pilot light may indicate carbon monoxide or combustion issues—this requires immediate attention.
If your home still feels cold even with the furnace running, or it takes longer to heat, the system may be losing efficiency.
Fast HVAC is an authorized installer and servicer of Lennox furnaces. This means your furnace is installed to the manufacturer’s specifications. Most importantly, your warranty is intact when installed by our pros. If your Lennox furnace needs service, our pros will be able to pinpoint the issue, with authentic Lennox replacements parts from in-stock inventory.
The technician starts with a walkthrough of your home to understand its layout, size, and insulation quality. They'll ask questions about your current heating performance, any comfort issues (cold rooms, drafts, high bills), and your preferences for energy efficiency or smart technology
To ensure proper sizing, the technician performs a Manual J load calculation. This includes the square footage of your home, window types and insulation levels, ceiling height, number of occupants, and local climate data. This calculation helps avoid installing a furnace that’s too big (wastes energy) or too small (can’t keep up).
They inspect your existing ductwork for leaks or gaps, sizing and airflow capability, and cleanliness or obstructions.
Based on the assessment, the technician will recommend furnace models (standard vs. high-efficiency Lennox models), discuss features like variable-speed blowers or smart thermostats, and present costs, rebate options, and warranties.
For your Lennox furnace, the HVAC technician will guide you on energy efficiency ratings (AFUE), expected utility savings, return on investment, and compatibility with future HVAC upgrades
Once you've selected a system, the technician provides a detailed estimate, schedules installation, and explains what to expect before, during, and after the install.
Servicing a Lennox home furnace involves a step-by-step inspection and tune-up to ensure it’s running safely, efficiently, and reliably—especially before the heating season kicks in. Here’s how our professional HVAC technician typically handles it:
Before starting, the technician will shut off power and gas to the furnace, follow Lennox manufacturer guidelines for safety and access, and wear protective gear and follow proper ventilation protocols.
Dust and debris can affect performance. The tech will clean the burners for even flame distribution, vacuum out the blower compartment, remove and clean the blower motor and fan blades if needed, and check and clean the flame sensor and ignitor.
The technician will carefully inspect the heat exchanger for cracks or corrosion (a critical safety check), burners for buildup or misalignment, wiring and connections for fraying, corrosion, or loose fittings, and the belts and moving parts for wear and proper tension.
A clogged filter can reduce efficiency and strain the system. The tech will check the air filter, and clean or replace it depending on condition
Our HVAC technician will test your thermostat to ensure it communicates properly with the furnace, the cycle timing is correct (on/off intervals), and the settings are calibrated correctly for comfort and efficiency
With everything clean and inspected, the technician will restart the system, monitor startup behavior, flame pattern, and blower operation, check gas pressure, voltage readings, and amp draws, and listen for abnormal noises or vibration
No matter the make or model of your furnace, we’ve got the skills to fix it.
We know there are many choices when it comes to furnace repair, and we don’t take your trust for granted. As homeowners ourselves, we understand what it takes to provide quality service that we’d expect for our own homes.
Here’s why Fast Heating & Air should be your top choice for furnace repairs in the Greater Seattle Metro:
Lennox furnaces are known for their energy efficiency, reliability, and advanced technology. With options like variable-speed motors, quiet operation, and smart thermostat compatibility, Lennox is a trusted choice for long-lasting comfort.
A professional HVAC technician will perform a load calculation to assess your home’s size, insulation, and layout. This ensures your Lennox furnace is properly sized for optimal efficiency and comfort.
Most Lennox furnaces come with a 10-year limited parts warranty and 20-year or lifetime heat exchanger warranties, depending on the model. Be sure to register your unit to activate full warranty coverage.
It’s recommended to have your furnace serviced annually, ideally before the heating season begins. Regular maintenance helps prevent breakdowns, extends the life of the unit, and keeps it running efficiently.
A tune-up includes cleaning burners and sensors, inspecting the heat exchanger, checking airflow and filters, testing safety controls and thermostat, and ensuring proper operation of the blower motor
Absolutely! Lennox offers models with high AFUE ratings (up to 98%) that can reduce energy costs and qualify for rebates or tax credits. A licensed contractor can recommend the best upgrade for your home.
Yes! We offer financing plans, and local utility rebates may apply for installing high-efficiency Lennox systems.
Always hire a licensed, experienced HVAC technician. Proper installation ensures safety, maximizes system life, and upholds the warranty.
When your home’s heating or cooling system breaks down, you need fast, reliable service from a company you can trust. In business since 1982, our award-winning HVAC team is known for honesty, quality workmanship, and exceptional customer care.
Our licensed technicians are trained to service all major brands and use the latest diagnostic tools to quickly identify and fix issues. We offer fair, competitive pricing and make every effort to resolve your Lennox HVAC problems efficiently and affordably. Whether it’s a furnace on the fritz or an AC system that’s lost its cool, we’re ready to help—your comfort is our top priority.
Let’s bring your vision to life with expert craftsmanship and thoughtful design.
16120 Woodinville Redmond Rd NE STE. 15
Woodinville, WA 98072
(206) 558 5112
hello@fastwaterheater.com
Monday – Friday 7:30am-5pm
24/7 Emergency Service Available
HVAC License
NORDSHA772L2
Electrical License
NORDSHA774MR
