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Best heating and air conditioning pros near Sumas, WA

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TRUSTED BY SUMAS, WA HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon35
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Sumas - Updated Nov 2026

Avatar for Four Seasons Heating and Cooling, LLC
Four Seasons Heating and Cooling, LLC
4.7(
69
)
Gas Furnace / Forced Air Heating System - RepairCentral A/C - Service or RepairHeat Pump - Repair or Service

Serving Sumas, WA and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"This is a small company that caters to keeping families warm. He came out the following morning (the morning after I put in the request with Home Advisor!), was able to complete the repairs quickly, ensuring that I had heat without the wait of other companies! Thank you!"
Response time10 hrs
4 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for West Mechanical, Inc.
West Mechanical, Inc.
4.3(
120
)
Gas Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceCentral A/C - Install+14 more

Serving Sumas, WA and surrounding areas

Approved

In business since 1976

Free estimates

Emergency services offered

"Hired West Mechanical to install a bathroom exhaust fan and light fixtures. Exhaust fan was left with duct disconnected and wiring exposed. Called Customer Service multiple times over 3-week period to get an estimate to reconnect the duct and address the wiring, still unresolved with open permit. UPDATE: I received a call from one of the company owners when he was made aware of the issue. He apologized for what I experienced and said it was very atypical for the company. He arranged to have an electrician complete the work the next day. The work included installation of a new duct transition that was not in the original scope, which was done at no charge. West Mechanical also sent a Supervisor the day after the work was completed to verify that the work was done to my satisfaction. Although I was unsatisfied earlier, I recognize that not every job will go as planned and I have been very impressed by how West Mechanical has responded. I would not hesitate to use them in the future."
Project
Project
Project
Project
Project

+5

Response time1 day
85 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Tekton Northwest LLC
Tekton Northwest LLC
5.0(
3
)
Ductless Mini-split A/C - Install or Replace

Serving Sumas, WA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"The Tekton team takes time to understand and recommend the right solution. Their timeliness and cost are good and fair. I have hired them 4 times now, and the work has been spot on everytime."
My jobs
My jobs
My jobs
My jobs
My jobs

+6

Response time8 hrs
Response rate100%
7 neighbors recently requested a quote
Lazer Construction LLC
4.6(
10
)
Thermostat - Install or ReplaceThermostat - Repair or Reprogram

Serving Sumas, WA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Mike and the Lazer crew are solid. Hired them to fix a crumbling sewer connection at our commercial building and they made quick work of it. Good communication and done right. Highly recommend and would hire Lazer again in the future!"
Remodeling - Kitchen & Bathroom Project
Remodeling - General Project
Sewer main line repair light landscaping and 2 homes re roofed
Drain Pipe Installation - Exterior Project
Roofing Project

+44

Response time1 day
Response rate100%
Recommended by100%of homeowners
Avatar for NORTHWEST HOME REPAIR SOLUTIONS L.L.C.
NORTHWEST HOME REPAIR SOLUTIONS L.L.C.
4.1(
9
)
Thermostat - Install or Replace

Serving Sumas, WA and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"Northwest Home Repair responded immediately when contacted about a water leak that I couldn't locate, but could hear. Two technicians worked to finally locate the leak (unfortunately it was in the crawl space under my house) and a third plumber made the repair. I was informed up front of all costs. The repair was completed within 5-6 hours of my call even though the responding plumbers were almost 60 miles from my location on Whidbey Island. I HIGHLY recommend Northwest Home Repair Solutions...they are five star professionals! Kit McCartney"
Before and after
before and after
Shed Installation
Shed Installation
Shed Installation

+26

6 neighbors recently requested a quote
Avatar for J and L Mechanical
J and L Mechanical
5.0(
9
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+47 more

Serving Sumas, WA and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"We would HIGHLY recommend J & L Mechanical for all your AC & HVAC needs!! Their customer service, prompt response time and execution at installation was amazing. When they came to install the system, they were on time, friendly, respectful of property plus went above and beyond to install our new thermostat which was not part of the "invoice". Thank you again!!"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Additional Photos

+3

Recommended by100%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

A new air conditioner capacitor will cost less than replacing the entire air conditioner system. While a capacitor itself will cost between $8 and $25, paying a professional to replace an AC capacitor will cost $180 on average. It’s not safe to replace an air conditioner capacitor on your own. 

If refrigerant levels are low, it can cause the evaporator coil to freeze up. Low freon causes a drop in pressure, which will make the coil too cold and cause moisture to freeze on the coil. Your system may be low on refrigerant because of a leak. 

Make sure to have maintenance performed twice a year, and contact your local HVAC technician if you suspect your system has low freon levels.

A common HVAC rule is that for every 500 to 600 square feet of living space, you need 1 ton of heating or cooling capacity. Now that you know this common rule, you also need to know that it isn’t very accurate, and a dedicated pro wouldn’t use it for your home. If you talk to a pro who won’t or can’t perform a proper Manual J calculation, consider hiring someone more thorough.

A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home’s air.

Swamp coolers cost approximately 50 percent less to install than central air conditioners and cost less to run. Operation costs depend on the size of the unit and home, your climate, utility rates in your area, and the system’s efficiency. Swamp coolers use 15 to 35 percent less power than air conditioners.

The Sumas, WA homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.