Snohomish & King counties

HVAC Services in Snohomish County, WA

Quick answer: Altitude Heating & Cooling repairs and installs furnaces, heat pumps, air conditioners and ductless mini splits, and offers tune-ups and maintenance plans. We serve Lake Stevens and Snohomish County. Call 425-201-1998.

Reliable HVAC repair, installation, and maintenance from your local comfort experts

Heating & Cooling Repair and Maintenance

When your comfort system isn’t working the way it should, you need fast, honest service you can trust. Altitude Heating & Cooling provides expert heating and air conditioning repair and maintenance throughout Snohomish and King County. Whether your AC isn’t cooling, your furnace won’t start, or your heat pump is making strange noises, our experienced technicians will diagnose the issue and explain your options clearly—no pressure, no surprises. We also offer routine tune-ups and maintenance to improve efficiency, prevent breakdowns, and extend the life of your system, helping you stay comfortable and avoid costly repairs.

Professional HVAC Installation & Replacement

If your system is old, inefficient, or beyond repair, we make upgrading simple and stress-free. Altitude Heating & Cooling specializes in professional HVAC installation and replacement, including heat pumps, furnaces, ductless mini-splits, and air conditioning systems. We take the time to properly size and design your system for your home, ensuring better comfort, lower energy bills, and long-term reliability. From helping you choose the right equipment to expert installation and cleanup, our local team handles everything with the quality and care you’d expect from a family-owned company.

Indoor Air Quality Solutions for a Healthier Home

The air inside your home can be filled with dust, allergens, pet dander, and other pollutants that affect your comfort and health. Altitude Heating & Cooling offers professional indoor air quality solutions to help your family breathe cleaner, healthier air year-round. From whole-home air filtration and air cleaners to humidity control and ventilation solutions, we’ll help you choose the right options for your home and lifestyle. Our team takes a practical, no-sales-pressure approach—focusing on real improvements in comfort, air quality, and system performance, not unnecessary add-ons.

Ready for Better Comfort in Your Home?

Click the links below to reach out, we would love to chat! whether its service or if you’re looking for energy efficiency improvements for your home, we’re ready

Signs your system needs attention

Uneven temperatures from room to room.
The system runs constantly or turns on and off every few minutes.
Strange noises or smells from the furnace, heat pump or AC.
Higher energy bills with no change in how you use the system.
It has been more than a year since the last tune-up.

What to expect from every visit

Every visit starts with a diagnosis. We test the system, find the real cause and explain it in plain language. You get the price before any work starts.

Our $49 HVAC diagnostic and maintenance visit is the easiest place to start. When a system is near the end of its life, we show you repair and replacement options side by side, and financing is available on new systems.

Serving Lake Stevens and Snohomish County

Altitude Heating & Cooling serves homes in Lake Stevens, Snohomish, Everett, Marysville, Granite Falls, Monroe, Lynnwood, Mukilteo, Bothell, Mill Creek, Arlington, Lochsloy and Clearview. Hours are Monday to Friday, 7 AM to 7 PM, and we answer after-hours calls.

Questions about our services

What is the difference between a repair visit and a tune-up?

A repair visit finds and fixes a problem. A tune-up cleans, tests and adjusts a working system to catch small problems early. Our $49 HVAC diagnostic and maintenance visit is a good place to start for either.

Should I choose a heat pump or a furnace?

For most Snohomish County homes, a heat pump is a strong choice because it heats and cools. A gas furnace still makes sense if you want very hot air on the coldest nights, and a dual-fuel system gives you both.

Do you offer maintenance plans?

Yes. Our HVAC maintenance plans keep your furnace, heat pump and AC checked on a regular schedule.

How do I book service?

Call 425-201-1998, request a free estimate on our contact page or book online. Every visit starts with a diagnosis and a clear price.