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HVAC Service in Lake Stevens & Snohomish County

Quick answer: Altitude Heating & Cooling provides HVAC service in Lake Stevens and across Snohomish County. We repair and install furnaces, heat pumps, air conditioners and ductless mini splits. Every visit starts with a full diagnosis and a clear price. Call 425-201-1998 or book our $49 HVAC diagnostic.

HVAC Services in Lake Stevens, WA

With years of experience, we strive not just to meet, but to exceed your expectations. Our mission is to deliver high-quality service with integrity and professionalism. We value your trust, which is why we prioritize clear communication, timely service, and quality workmanship in every job we take on.

    
 
 
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   Kari McPhail 
 
 
 
 Trustindex verifies that the original source of the review is Google. They did a wonderful job replacing our AC unit! Wonderful price and service!
  
 
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   Ted Granston 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quick, professional service!  Highly recommend!
  
 
      Posted on Google  
   
   E.J Martin 
 
 
 
 Trustindex verifies that the original source of the review is Google. We highly recommend Altitude Heating & Cooling for HVAC systems.
Justuce and Dylan replaced our 26 year old, 2 HVAC systems in March, 2026 .
It was a wonderful experience that we had with them. They were dedicated, attention to details and especially, they care for their customers.

Here’s an example.
We had a clothes dryer vent that directly blew out to heat pumps and had to clean up occasionally for years. They bought a vent and flex hose for the new location and its perfect location. They didn’t charge for the materials and labor, and it was a surprise gift for us.

It was an example of how they care about their customers and take pride in their work.
The HVAC systems are expensive. They gave us 3 options to work within our budget to find the right fit for us.
I hope this review helps you decide to hire this company to install your house systems. We’re lucky to have Justuce and Dylan.
Nice work Gentlemen!
  
 
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   linda boysen 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great service! Will definitely use them again
  
 
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   Meaghan Dee 
 
 
 
 Trustindex verifies that the original source of the review is Google. They were very quick and efficient! My job had some duct work, a little bit of roofing, and a little bit of electrical, and they were able to do it all. I am a happy customer.
  
 
      Posted on Google  
   
   Susanna Mantis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Justus and Dylan were kind, considerate and helped fix my heat splits. I felt I understand the systems now. Thank you!!

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Our Commitment to You

We’re a trusted partner for your HVAC needs, providing reliable service that helps keep your home comfortable year-round. Our friendly team of experts are here to ensure your systems run efficiently and effectively, bringing you peace of mind.

Frequently Asked Questions

What should I do if my HVAC stops working?

If your HVAC system suddenly fails, the first step is to check your thermostat settings and ensure it’s set to the desired temperature. If it’s unresponsive, check for any blown fuses or tripped breakers. If those steps don’t resolve the issue, it’s best to contact us for prompt service.

What signs indicate I need repairs?

Some common signs that suggest your HVAC may need repairs include strange noises, unusual odors, constant cycling on and off, or poor airflow. If you notice any of these issues, it’s wise to reach out to us for an inspection.

Do you offer emergency services?

Yes, we provide emergency HVAC services. If you’re facing an urgent issue, feel free to call us anytime. Our team is ready to assist you quickly and get your system running again as soon as possible.

What can I expect during an installation?

During an installation, our technicians will assess your space and discuss your needs. We’ll handle the entire process, ensuring that your new system is set up safely and efficiently. You’ll receive detailed information about operating your new unit afterward.

Heat Pump Services

Expert heat pump service, repair, and installation for year-round comfort. We install high-efficiency heat pumps designed for Washington’s climate.

Heat pump installation

AC Services

Expert air conditioning service and installation for reliable home comfort. We repair, maintain, and install efficient AC systems built for the Pacific Northwest.

AC installation

Furnace Services

Professional furnace service and installation in Snohomish & King Counties. Reliable heating repairs and high-efficiency furnace installs built for PNW winters.

Furnace installation

No heat? Emergency repair

Furnace or heat pump down? We answer after-hours calls for emergency heating and cooling repair across Snohomish County.

Signs your heating or cooling system needs service

The furnace or heat pump runs, but the house never reaches the thermostat setting.
The system turns on and off every few minutes.
Some rooms are always too warm or too cold.
New noises such as banging, grinding, squealing or rattling.
A burning, musty or electrical smell from the vents.
Heating or cooling bills keep rising while your habits stay the same.

What to expect when you call Altitude

Every visit starts with a diagnosis. Our technician tests the system, finds the real cause and explains it in plain language before anything is repaired. You get the price before any work starts, so there are no surprises on the invoice.

Not sure what is wrong? Book our $49 HVAC diagnostic and maintenance visit. If your 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.

Local HVAC service across Snohomish County

Altitude Heating & Cooling is based in Lake Stevens at 3418 147th Ave NE. We repair and install furnaces, heat pumps, air conditioners and ductless mini splits for homes in Lake Stevens, Snohomish, Everett, Marysville, Granite Falls, Monroe, Lynnwood, Mukilteo, Bothell, Mill Creek, Arlington, Lochsloy and Clearview.

Our hours are Monday to Friday, 7 AM to 7 PM, and we answer after-hours calls when your heating or cooling stops working.

HVAC service questions

What areas do you serve?

We serve Lake Stevens and homes across Snohomish County, including Snohomish, Everett, Marysville, Granite Falls, Monroe, Lynnwood, Mukilteo, Bothell, Mill Creek, Arlington, Lochsloy and Clearview.

What HVAC services do you offer?

We repair and install furnaces, heat pumps, air conditioners and ductless mini splits. We also offer tune-ups, maintenance plans and emergency HVAC repair.

How much does an HVAC diagnostic cost?

Our HVAC diagnostic and maintenance visit is $49. You get the price of any repair before work starts.

Do you answer calls after hours?

Yes. Altitude Heating & Cooling answers after-hours calls for no-heat and no-cooling problems in Lake Stevens and Snohomish County.

Do you offer financing?

Yes. Financing is available on new furnaces, heat pumps, air conditioners and ductless systems.

Related services and guides

Services in this area

Areas we serve

Main Office

3418 147th Ave NE, Lake Stevens WA 98258

425-201-1998

Hours: Mon to Fri 7 AM to 7 PM. After-hours calls answered.

We’re here to help—local, reliable, and ready when you need us. Contact Altitude Heating & Cooling for consultations, HVAC service, or general inquiries. Proudly serving Everett, Lake Stevens, Marysville, Monroe, Snohomish, Mukilteo, and Lynnwood—plus many more surrounding cities with fast response and honest local service.