Always On Time

Mercer Island HVAC Services

One Hour Heating & Air Conditioning® Serving Mercer Island

4.82

(209525 reviews)

Best HVAC Company Serving Mercer Island, WA

Choose One Hour for Reliable HVAC Repair & Replacement

Your home should be comfortable every day of the year, whether you're staying warm during a damp Pacific Northwest winter or keeping your family cool through increasingly warm summer afternoons. At One Hour Heating & Air Conditioning® of Newcastle, we provide professional HVAC repair, installation, maintenance, and replacement services for homeowners throughout Mercer Island, WA.

From waterfront properties overlooking Lake Washington to established neighborhoods in the center of the island, Mercer Island features a wide variety of custom homes, remodeled residences, and long-established properties - each with unique heating and cooling needs.

Our experienced technicians provide personalized recommendations designed around your home's layout, existing equipment, and comfort goals rather than a one-size-fits-all solution. Whether you're dealing with an HVAC emergency or planning a complete system upgrade, we're here to help.

Complete HVAC Services in Mercer Island

Every home depends on reliable heating and cooling, but every HVAC system eventually requires service. Our technicians provide complete residential HVAC services, including:

Air conditioning repair
Furnace repair
Heat pump repair
HVAC installation
HVAC replacement
Seasonal maintenance
Indoor air quality solutions
Thermostat repair
Ductless mini-split systems
Emergency HVAC service

No matter the make or model of your equipment, our goal is to restore your home's comfort quickly while helping you understand your repair or replacement options.

Air Conditioning Services in Mercer Island

Air conditioning has become increasingly important for homeowners throughout the Seattle metro area. If your AC system is:

Blowing warm air
Running constantly
Producing weak airflow
Making unusual noises
Leaking water
Failing to maintain the thermostat setting

Our technicians can diagnose the issue and recommend the appropriate repair. We service central air conditioners, heat pumps, and ductless mini-split systems throughout Mercer Island.

If your equipment has reached the end of its useful life, we'll help you compare replacement options designed for your home's size and comfort needs.

Heating Services You Can Depend On

When colder weather arrives, your heating system should operate safely and efficiently. We provide comprehensive heating services including:

Furnace Repair: Whether your furnace won't start, cycles repeatedly, or isn't producing enough heat, we'll identify the cause and recommend the right repair.

Furnace Replacement: Older furnaces often become less reliable over time. If replacement makes more financial sense than continued repairs, we'll explain your options without pressure.

Heat Pump Service: Heat pumps provide efficient heating and cooling in one system and continue to become more popular throughout Western Washington. We install, repair, and maintain heat pump systems for Mercer Island homeowners looking for year-round comfort.

HVAC Solutions Designed for High-Performance Homes

Many Mercer Island homes include features that place higher demands on heating and cooling systems than a typical house. Large windows with lake views, multiple living levels, home offices, finished basements, vaulted ceilings, additions, and custom renovations can all create unique comfort challenges.

Rather than simply replacing equipment with the same size system, we evaluate factors such as:

Home size
Existing ductwork
Airflow
Insulation
Room usage
Comfort concerns
Energy efficiency goals

This helps ensure your HVAC system delivers consistent comfort throughout your home - not just in one or two rooms.

Preventative HVAC Maintenance

Unexpected HVAC breakdowns rarely happen at a convenient time. Routine maintenance helps identify worn components before they become larger repairs while keeping your system operating efficiently throughout the year.

Our maintenance services include inspections of critical components, performance testing, safety checks, airflow evaluation, and cleaning where appropriate.

Regular maintenance can also help maximize equipment life and reduce the likelihood of emergency service during peak heating or cooling seasons.

Why Mercer Island Homeowners Choose One Hour Heating & Air Conditioning® of Newcastle

Choosing an HVAC contractor means trusting someone inside your home. Our customers appreciate our commitment to professionalism, communication, and quality workmanship. When you work with One Hour Heating & Air Conditioning® of Newcastle, you can expect:

Always On Time Guarantee: We value your time by arriving within your scheduled appointment window.

StraightForward Pricing®: You'll receive clear pricing before work begins, so you know exactly what to expect.

Experienced, Professional Technicians: Our technicians receive ongoing training and take the time to explain their findings in plain language.

Respect for Your Home: We understand the importance of treating every home with care by working neatly and minimizing disruption whenever possible.

Emergency HVAC Service: Heating and cooling problems don't always happen during business hours. We're available when you need us most.

Schedule HVAC Service in Mercer Island Today

Whether you need an urgent furnace repair, a new heat pump, seasonal maintenance, or a complete HVAC replacement, One Hour Heating & Air Conditioning® of Newcastle is ready to help.

We're proud to serve homeowners throughout Mercer Island with dependable heating and cooling services backed by professional workmanship, honest recommendations, and exceptional customer care.

Contact our team today at (833) 323-3903 or get in touch with us online to schedule HVAC service in Mercer Island, WA.

Learn more about our Newcastle, WA-based HVAC experts.

Book Now

HVAC Near Me In...

services the following communities:

Bellevue
Newcastle
Tukwila
Renton
Mercer Island
Medina
Clyde Hill
Hunts Point
Yarrow Point
Beux Arts Village
Newport Shores
Factoria
Newport Hills
Somerset
Cougar Hills
Lakemont
Coal Creek
Coalfield
May Creek
Kennydale
East Renton Highlands

We have a reputation for being punctual, friendly and knowledgable

4.82

(209525 reviews)

Read More Reviews

Roger was an absolute dream to work with. He was punctual, accurate, very straightforward with what I needed, and very helpful to accommodate additional things. I would recommend him for any job heating or cooling. Alex, his helper was very respectfulal, showed up on time, and worked nonstop throughout the day.

Laura Paulus

in the last week

Alex was punctual, kind and informative.

Kara Marong-Houlahan

in the last week

Joe was great he got my air quality right

LJ Hassell

in the last week

Joseph helped me out and was awesome definitely recommend

Deziree Burford

in the last week

Josh and Dennis were really good and polite. Explained everything to detail so we understood. Would recommend to everyone.

Timothy Galpin

in the last week

I have owned a mini split system for 5 years with multiple heads. I have had 4 different hvac techs out to work on it. They could never get it to work right. Jeffery with One Hour came out figured out the problem. Rewired the units and it has never worked better. They did a great job! I will be using them in the future. Highly Reccommend!!!

John Benner

a week ago

Andrew and Brad are trustworthy and dependable.. One hour will be no problem for them!

Heather Walker

a week ago

Wow! What exceptional customer service. From the moment they answered the phone I knew I had made the right choice. The representative I talked to was so friendly and knowledgeable and willing to work with my schedule. That of course was only the beginning. The technician who showed up was clean cut and dressed very neatly. Putting his shoe covers on first thing to protect my home. I told him it wasn’t necessary but he insisted. Instead of just jumping into the repair like previous companies I dealt with. He took the time to ask me several questions about what was currently happening and the history of my equipment. He then proceeded to explain the whole process of how the call would go. Once he was finished with the diagnostic, which was very thorough I might add. He then asked if it was ok to present a few different options. Educating me in detail on each option, but never trying to sell or lead me. It was very low pressure. Well I picked the right option for me and my system is working better than ever. 5 stars service start to finish, Great job guys,

Jay Atlee

2 weeks ago

The technicians who came out today were friendly, helpful and knowledgeable. We were impressed that they outlined 4 options for us to consider, explaining each option in detail. We have found our new HVAC company! Thank you One Hour HVAC! We are happy you joined our community!

Pamela Berklich

2 weeks ago

Colin was great! Very knowledgeable and gave us peace of mind that the AC would be repaired. He was very professional and talked us through each step of process. He completed the job in a very timely manner and got us back on track. Thank you Colin and I would definitely recommend and use this company again if the need arises.

Anthony Boudreaux

a month ago

You've got questions

We've got answers

View All FAQs

Expert Tips

Learn From Our HVAC Experts

View More Tips

Choosing Fan Settings for Your Air Conditioning System

View Article

Air Quality

Knowing When and How to Upgrade Your HVAC System

View Article

Air Conditioners

AC Revitalization: A Practical Guide to Keeping Your Home Cool, Efficient, and Comfortable

View Article

Air Conditioners

View More Tips

Servicing your entire home

Part of the Authority Brands Family

Authority Brands is the leading provider of in-home services, building brands that support the success of franchisees as well as better the lives of the homeowners we serve and the people we employ.