What’s the best thermostat setting for summer in Newcastle?

For optimal comfort and energy savings during summer in Newcastle, set your thermostat to 78°F (25°C) when you're home. If you're away, raising it to 85°F can help reduce cooling costs. Using a programmable or smart thermostat can make these adjustments automatic and more efficient.

Do you provide emergency after-hours HVAC service in Newcastle?

We are available 24/7 to take your call for emergencies. Our appointment hours are listed above.

How can I improve indoor air quality in Newcastle?

To improve indoor air quality in Newcastle, start by regularly changing your HVAC filters, scheduling routine maintenance, and using air purifiers. Consider duct cleaning if your home has excessive dust or allergy symptoms. Proper ventilation and keeping your home clean are key to healthier air.

How often should I service my HVAC system in Newcastle?

It’s ideal to service your cooling system each spring and your heating system each fall to ensure you find small issues before they become big problems.

Do you offer HVAC financing in Newcastle?

We work built relationships with several lenders to ensure our customers are able to restore comfort in their homes. Ask your technician about your financing options.

How often should I have my furnace serviced in Newcastle?

It’s recommended to have your furnace professionally serviced once a year, ideally in the fall before the heating season begins in Newcastle. Annual maintenance helps ensure safe operation, improves efficiency, and can extend the life of your system.

How often should I have my air ducts cleaned in Newcastle?

It’s generally recommended to have your air ducts cleaned every 3 to 5 years in Newcastle, or more often if you notice dust buildup, allergies, or musty odors. Homes with pets, recent renovations, or high pollen levels in Tukwila may benefit from more frequent cleanings to maintain healthy indoor air quality.

How often should I schedule AC maintenance in Newcastle?

You should schedule AC maintenance once a year, ideally in the spring before the cooling season starts in WA. Regular tune-ups help your system run efficiently, prevent breakdowns, and extend the life of your unit, especially important in Newcastle's summer climate.

What size HVAC system is right for my home in Newcastle?

The right HVAC system size for your home in Newcastle depends on factors like square footage, insulation, number of windows, and local climate. A professional load calculation ensures your system is properly sized for comfort and efficiency. Oversized or undersized units can lead to higher energy bills and uneven temperatures.

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One Hour Heating & Air Conditioning® of Newcastle|
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Bringing Comfort Home

Newcastle HVAC Services

One Hour Heating & Air Conditioning® of Newcastle

(19 reviews)

Heating & Cooling

Services By One Hour

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Newcastle AC Services

Air Conditioning Repair, Installation & Maintenance

When homeowners want a reliable air conditioning and heating system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the leading HVAC service provider in the Newcastle and the surrounding areas for a simple reason: we actually care about your comfort.

At One Hour Heating & Air Conditioning® of Newcastle, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time—guaranteed.

We Have a Reputation

For Being Punctual, Friendly and Knowledgable

(19 reviews)

Garo Youssoufian

a month ago

“Exceptional service from the owner and technician. They repaired my heating system so it runs like a charm now-just in time for winter. They were also very transparent about price and timeline. Highly recommend for professionalism and peace of mind.”

a month ago

“Very professional team! Denis and Devan provided insightful information during my consultation. They were upfront and honest about ideal options for my issue. Would definitely recommend to anyone in need of HVAC services in the area!!!”

Erin Gardner

a month ago

“Devan came out the same day to check our furnace and provide quotes. He was very nice, professional, and took the time to explain everything clearly. Great service and quick response—highly recommend.”

Zac Pierce

3 weeks ago

“Devan and Nick arrived on time with exceptional communication before, during. and after my service. I had never had a service for my heat pump before and they went above and beyond to clean and flush our unit. We immediately noticed the improvement to both the efficiency of the heat and the quality of the air itself. So glad we contacted them and will be utilizing them for all future services.”

Kylie Dean

2 months ago

“Exceptional service and integrity! I’ve had the pleasure of working with Devan for years and even followed him over to One Hour Heating & Air Conditioning from his previous company — that’s how much I trust him. He’s consistently professional, honest, and incredibly thorough with every job. Devan truly takes pride in his work and always explains things clearly, never rushing or trying to upsell. It’s rare to find someone with such integrity and genuine care for their customers. Because of him, I’ll always choose and recommend One Hour Heating & Air Conditioning.”

Special Offers

Mention these discounts at time of service

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Premium Service Plan

Premium Plan – $21.99/mo ($264/yr) • Annual A/C & heating maintenance • Standard 1" filter per visit • Thermostat batteries & programming • No standard trip/diagnostic fees • 15% discount on repairs • Up to $500 replacement credit • 2-year repair warranty • Priority scheduling • Safety & airflow inspection • Emergency response priority

Membership services listed and plan discounts vary and may change based on individual franchise location. Membership renewal period is one year. Cannot be combined with any other offer. Not redeemable for cash. Valid only at participating locations.
Heroes Service Plan

Hero Plan – $17.99/mo ($216/yr) • Annual A/C maintenance • Annual heating maintenance • Standard 1" filter per visit • Thermostat batteries & programming • No standard trip/diagnostic fees • 15% discount on repairs • Up to $500 replacement credit • 2-year repair warranty • Priority scheduling • Safety & airflow inspection • Emergency response priority

Membership services listed and plan discounts vary and may change based on individual franchise location. Membership renewal period is one year. Cannot be combined with any other offer. Not redeemable for cash. Valid only at participating locations.
Basic Service Plan

Basic Plan – $15.99/mo ($192/yr) • Annual A/C or heating maintenance • Standard 1" filter per visit • Thermostat batteries • 2-year repair warranty • Standard scheduling • Safety & airflow check

Membership services listed and plan discounts vary and may change based on individual franchise location. Membership renewal period is one year. Cannot be combined with any other offer. Not redeemable for cash. Valid only at participating locations.

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Newcastle HVAC Services You Can Count On

Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, we're an independently owned and operated business with a personal investment in the local community. We back our work with a 100% satisfaction guarantee, provide StraightForwardPricing® guides for your benefit, and will pay you back for being even one minute late to an appointment.

Here For You

When You Need Us Most!

Yellow One Hour Heating & Air Conditioning service van with company branding and slogan.

'Round the Clock Availability

No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
100% Satisfaction Guarantee

We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
StraightForward Pricing® Guide

Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
Always On Time…Or You Don’t Pay A Dime!®

We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.

Financing Available!

Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.

Discover Your Options

HVAC Near Me In...

One Hour Heating & Air Conditioning® of Newcastle services the following communities:

Bellevue
Newcastle
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

One Hour Heating & Air Conditioning technician talking to a customer on the phone.

Hours of Operation

We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:

Monday

24 hours

Tuesday

24 hours

Wednesday

24 hours

Thursday

24 hours

Friday

24 hours

Saturday

24 hours

Sunday

24 hours

You've got questions

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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.