Few things are more frustrating than hearing your air conditioner running nonstop while your home stays warm. You can feel air coming through the vents, but the temperature never seems to drop.
Along with the discomfort, the issue often leads to higher energy bills and concerns that something serious may be wrong. In many cases, an air HVAC in Portland that runs without cooling is reacting to a problem that builds quietly over time.
Understanding what may be happening can help you take the right next step.
Six Common Culprits Behind a Non-Cooling AC
Dirty or Clogged Air Filter
As time passes, filters fill with dust and debris, restricting airflow. When airflow drops, the system struggles to circulate cool air throughout your home. You may notice weak airflow, rooms that cool unevenly, or longer run times
Check your air filter regularly and replace it as needed to restore performance and reduce strain on the system.
Refrigerant Issues or Leaks
Refrigerant plays a key role in removing heat from your home. When refrigerant levels are low, your AC cannot cool effectively. The problem often happens due to leaks, which may also cause hissing sounds, warm air from vents, or ice forming on refrigerant lines.
Refrigerant problems require professional repair. Running the system with low refrigerant can damage components and lead to higher repair costs later.
Frozen Evaporator Coil
A frozen evaporator coil can prevent your AC from cooling, even in hot weather. The issue usually results from restricted airflow or refrigerant issues. You may see ice on the indoor unit or notice water pooling once the ice begins to melt.
If you suspect a frozen coil, turning the system off can help prevent more damage. A technician can identify the cause and restore proper operation safely.
Thermostat Problems or Incorrect Settings
Sometimes the issue has less to do with the AC itself and more to do with the thermostat. Incorrect settings, dead batteries, or calibration issues can cause the system to run without cooling properly.
Thermostat placement also matters. Units located near windows, vents, or heat-producing appliances may misread the room temperature, leading to cooling problems that feel like a system failure.
Dirty or Blocked Condenser Unit
The outdoor condenser unit releases heat from your home. When it becomes blocked by dirt, leaves, or grass clippings, heat cannot escape efficiently. This limits cooling performance and forces the system to work harder.
Keep the area around the unit clear and gently remove debris to maintain proper airflow and cooling efficiency.
Ductwork Leaks or Airflow Problems
Even when your AC is working correctly, damaged or leaking ductwork can prevent cool air from reaching your living spaces. Air may escape into attics or crawl spaces, leaving certain rooms warmer than others.
Signs include uneven temperatures, weak airflow, or rising energy bills. Duct inspections can uncover hidden issues that reduce comfort and efficiency.
Call A-TEMP for Trusted Services for Your HVAC in Portland
When your AC runs without cooling, it’s usually a sign that something needs attention sooner rather than later. At A-TEMP, we specialize in HVAC repairs that fix the issue at the source, along with maintenance that helps prevent repeat problems and installations designed to perform reliably long-term.
With more than 50 years of experience, our team is known for prompt response times, background-checked technicians, and job sites kept clean from the first step to final walkthrough.
You’ll also receive straightforward pricing before work begins and systems built with trusted, industry-leading equipment.
Reach out to our team today for an appointment!
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Quality Service That Will Make You Smile
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A-TEMP Heating, Cooling & Electrical came recommended from a friend who is a current inspector. I've used them for years for furnace and AC maintenance. Their customer service is excellent—helpful, friendly, and persistent in scheduling my maintenance. I appreciate that they've never pushed to replace my old furnace but instead helped me decide when to repair or replace without being pushy about sales. Finding trustworthy repair folks is hard, and I highly recommend them. You won't be disappointed.
A-TEMP Heating, Cooling & Electrical goes above and beyond to take care of their customers. I've been a customer for years and am impressed with the technicians and office staff. The fact that this is a family business is also a plus. Thank you.
A-TEMP Heating, Cooling & Electrical did a wonderful job. They were on time, wore shoe coverings, and worked diligently. They replaced our air filter and an electrical part under warranty, explaining everything clearly. The work was clean and professional, and the team was congenial and pleasant.
Everyone we’ve dealt with has been polite, positive, and very courteous. A-TEMP Heating, Cooling & Electrical quickly replaced our furnace during the coldest part of a snowy winter. Other companies couldn’t get out for 1-2 weeks, but A-TEMP assessed it the same day and replaced it in 2 days. Can’t say enough great things about this company!
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