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On the Beach in Summer

Willamette HVAC is your #1 HVAC contractor in Hillsboro, Oregon and the surrounding communities. Whether it is your air conditioner (AC) or heat pump that needs service, we are the leading company for all of your cooling needs. If you need repairs, maintenance, or a brand new system installed, the technicians at Willamette are the qualified and professional crew for the job.

We provide the highest quality service for your air conditioner, heat pump, ductless system, and beyond. We also aim to educate and inform our customers. Informed decisions are good decisions. We want you to feel confident we are qualified to perform the service for which you are hiring us.


The four main components to your air conditioner are:

  • Condenser
    The condenser is the outside metal unit and where the gas from the compressor is condensed into a liquid. The gas entering the condenser is very hot. The temperature is then lowered, so the gas can convert back to a liquid.
  • Compressor
    The compressor is inside the condenser. It circulates the pressurized refrigerant, to concentrate the heat, and changes the low pressure gas to high pressure.
  • Evaporator
    The evaporator is the part of the system inside the home. In simple language, it absorbs the heat from your home.
  • Expansion Valve
    The expansion valve controls the amount of refrigerant in your system.

All of these pieces are connected by a copper tube that handles refrigerant, creating a closed loop. Heat is collected in the evaporator, sent outside to the condenser. The heat is removed, and the cool air is recirculated back into your home.

AC In the Know

An air conditioner doesn’t create cool air.
What happens in the AC process is actually the removal of heat from the air. Your AC uses a chemical called refrigerant to remove heat and transfer it outside. The warm air runs through the lines and coils in your unit and goes from liquid to gas and back again. During this process, the refrigerant removes the heat and transfers it elsewhere so that when the air comes out the other side, it is cool.

Your AC will remove humidity.
Lower humidity helps the overall comfort level in your home by making you feel cooler, even if the temperature is the same.

Your air filter needs to be checked and replaced every three to six months (depending on the manufacturer’s recommendations).
A dirty air filter restricts your air flow, which reduces efficiency, costing you money, and over time can put stress on your unit and could cause a costly repair.

Maintenance, maintenance, maintenance.
Your HVAC system needs regular checkups to keep it running in tip-top shape. Having regular annual preventative maintenance will bring your system longer life and fewer breakdowns over all.


The Seasonal Energy Efficiency Ratio (SEER) measures air conditioning and heat pump cooling efficiency, which is calculated by the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. A higher SEER rating means greater energy efficiency.

At Willamette HVAC, we provide all the services you need to keep your AC running in top-notch shape. Call us for repairs, maintenance, or new-system installation.


Willamette HVAC is a dealer of both Bryant Ductless and Daikin Ductless.

What Is Ductless?
Often called split systems or mini-split systems, ductless heating and cooling is one of the easiest places to save money on your home energy bill. Depending on the size and layout of your space, ductless systems can be more expensive to install; however, they may reduce your monthly bill by up to 30 percent. In a traditional central air system, you lose energy through leaks and holes in your duct system. A ductless system removes that variable.

Ductless is quiet, efficient, and, since it also functions as a heater, it can provide you and your home with more comfort options than a standard air conditioner and furnace combination.

All of the staff at Willamette HVAC is committed to finding you the perfect cooling system for your home. If you are not comfortable, we are not happy. Call us today for annual maintenance, repairs, or new installations. We are standing by to take your call.

Do You Need Service for Your Cooling System?

Air Conditioner Repair in Hillsboro, OR 97123

Performed by:

“J Chapman did a fantastic job he really explained everything.”

– Tatyana O.

Air Conditioner Installation in Hillsboro, OR 97123

“Will and Jesse arrived on time and got right to work while communicating with me the whole entire time. Excellent work! They reviewed with me what they exactly did and how each component worked.”

– Paul S.

Air Conditioner Repair in Hillsboro, OR 97123

Performed by:

“Thanks for the great service on our original service call. You guys were prompt and thorough.”

– Cliff Z.

Air Conditioner Repair in Hillsboro, OR 97123

Performed by:

“J was very helpful, he walked me through the entire unit. He did the job and did it right. He provided great service and a great price will be referring us to all of his contractor friends. J did a great job.”

– Jim M.

Air Conditioner Repair in Hillsboro, OR 97123

“Lee did an awesome job, Got right in and got it fixed and did a great job.”

– John S.

Air Conditioner Installation in Hillsboro, OR 97123

Performed by:

“Just got a new AC unit installed yesterday and was very happy with the service provided by Will and Phil they did a great job and were friendly and professional. Looking forward to a cool house this summer. Thanks for the quick turn around time. Once we confirmed the install and signed the paperwork they came out the next day and installed. Can't get better than that. I have all ready referred two of our friends. Thanks again great job guys!”

– Kara D.

Heat Pump Installation in Other, OR 97210

“Will and Bill- Nice gentlemen, Very Professional and helpful”

– Julie H.

Air Conditioner Maintenance in Other, OR 97232

Performed by:

“I've been using Willamette for couple years to service several commercial properties always received great customer service and quality. Ryan and J are an amazing techs will answer any question, keep up the good work!”

– Igor A.

Willamette HVAC is proud to offer heating and cooling services to Portland, Vancouver, Hillsboro, Beaverton, Aloha, Cornelius, Forest Grove, North Plains, Banks, Tigard, Tualatin, Sherwood and the surrounding communities.
Request service online today or call us at 503-259-3200.

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