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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 Maintenance in Forest Grove, OR 97116

Performed by:

“Jeremy was very kind and provided valuable information. He also showed up on time (which is more than we can say for most of our contractors), and didn't leave a mess behind him.”

– John A.

Air Conditioner Maintenance in Beaverton, OR 97003

Performed by:

“Ryan is always professional and courteous and does a great job on my equipment.”

– Doris D.

Air Conditioner Maintenance in Hillsboro, OR 97124

Performed by:

“Jeremy performed AC maintenance in my house. He answered all my questions regarding process with clarity and conciseness to my satisfaction by explaining what will be done and in what order. I commend him for attention to details and solid work ethics.”

– Larysa B.

Air Conditioner Maintenance in Beaverton, OR 97225

Performed by:

“Ryan Odell was coming for HVAC maintenance last week. and our heating just didn't work properly last week. When we told him, he spent a lot of time on repairs. Now everything is fine, especially when it is snowing today and the heating is working normally. Good job, Ryan Odell. Thank you for your effort.


– Bernard C.

Heat Pump Maintenance in Tualatin, OR 97062

Performed by:

“I've used Antrim's and now Willamette for HVAC service at 2 homes. First was boiler repair and maintenance, second was heat pump and general HVAC service. Both times Devin come out and did an outstanding job. I highly recommend him.”

– Chuck S.

Heat Pump Repair in Hillsboro, OR 97123

“Phil & Bill went above and beyond on the repair of my failed heat pump. It is great to watch them working together as a team.”

– Jay B.

Air Conditioner Installation in Other, OR 97231

Performed by:

“Jesse and John were exceptional mechanics who did an excellent job. They knew what they were supposed to do and did it without me knowing that they were there when they were done.”

– Frank P.

Air Conditioner Maintenance in Wilsonville, OR 97070

Performed by:

“Jeremy did an excellent job at getting the problem fixed quickly! He was pleasant to work with and we would highly recommend.”

– Michelle S.

Air Conditioner Repair in Hillsboro, OR 97124

Performed by:

“Your technician, Ryan Odel attended our hotel today. We were very happy with his service. He quickly diagnosed our AC problem and had everything up and running in a short amount of time. He was courteous and left the work area clean before he left. You can send him our way anytime. Thanks for the great service!!”

– Lani M.

Heat Pump Maintenance in Hillsboro, OR 97123

Performed by:

“Jeremy came out today to check my heat pump. Very professional and friendly. He did a wellness check on my unit and covered everything possible. I would recommend him to others.”

– Charles H.

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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