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During peak summer heat in the Tri-Cities and Yakima Valley, air conditioners run longer than usual. Temperatures regularly climb into the 90s and push past 100 degrees near Columbia Park, the Yakima River, and neighborhoods surrounding the Toyota Center.

But when an ac won’t turn off at all, the system may be struggling with airflow, thermostat problems, refrigerant issues, or worn components.

Ignoring constant operation can increase energy use, place extra strain on equipment, and shorten system lifespan. Addressing the issue early helps improve system performance and reduces the risk of a larger breakdown during extreme heat.

If your system has started running nonstop, schedule online today with Campbell & Company.

Common Reasons Your AC Won’t Turn Off

Several issues can cause an air conditioner to not shut off, especially during heavy summer cooling demand across the Columbia Basin.

Common causes include:

• Thermostat malfunction or incorrect settings
• Dirty air filters restricting airflow
• Blocked vents or ductwork problems
• Low refrigerant levels
• Electrical issues affecting system cycling
• Aging components reducing cooling performance
• Extreme outdoor temperatures increasing cooling demand

Some homes also experience their ac running constantly because the system is undersized for the property.

Thermostat and Control Issues

A faulty thermostat can keep the cooling system running longer than necessary. Incorrect calibration, poor sensor placement, or communication issues between the thermostat and equipment may prevent the system from cycling off normally.

Homes near the REACH Museum, West Valley, and older Yakima neighborhoods sometimes deal with outdated thermostats that no longer read temperatures accurately.

Professional inspections from our HVAC services team can help determine if the thermostat is causing the issue or if another electrical problem is affecting operation.

Airflow and System Efficiency Problems

Restricted airflow is one of the most common reasons an AC system struggles to shut off.

Common airflow issues include:

• Dirty filters
• Closed or blocked vents
• Dirty evaporator coils
• Ductwork leaks
• Weak blower performance

When airflow gets restricted, the system has a harder time reaching the thermostat setting. During extended heat waves near Sacajawea State Park or throughout Kennewick and Pasco, poor airflow can force cooling cycles to run much longer than normal.

Routine visits through the maintenance plan can help catch airflow issues before they lead to larger cooling problems.

Refrigerant and Mechanical Issues

Low refrigerant levels can make cooling systems struggle to remove heat effectively. When refrigerant drops below proper levels, the system may continue running without reaching the desired indoor temperature.

Mechanical issues involving compressor operation, capacitors, or electrical components can also affect normal system cycling.

If refrigerant levels or mechanical problems are involved, professional AC repair service is usually needed to diagnose the cause correctly.

Why This Happens More in Tri-Cities & Yakima

Eastern Washington summers place heavy demand on cooling systems. Homes throughout Richland, Yakima, Pasco, and Ellensburg often rely on air conditioning for long stretches during periods of extreme heat.

Systems near the TRAC Center, the Yakima/Naches Rivers, and surrounding desert areas may run longer simply because outdoor temperatures stay elevated late into the evening.

Over time, that constant workload increases wear on filters, motors, refrigerant systems, and electrical components. In some cases, older systems eventually make a new AC install necessary when repairs become less practical.

When to Call a Professional HVAC Technician

An AC system that never shuts off should not be ignored for long.

Warning signs include:

• Uneven cooling
• Weak airflow
• Warm air from vents
• Constant cycling
• Rising utility bills
• Ice buildup on refrigerant lines
• Thermostat problems

Homeowners asking why my ac is always running often discover that delaying repairs allows smaller issues to become larger system failures.

Professional diagnosis helps identify the actual cause before additional damage affects system performance.

Why Homeowners Trust Campbell & Company

Campbell & Company has served homeowners throughout the Tri-Cities, Yakima Valley, and Ellensburg areas since 1983. Our technicians understand the cooling demands created by Eastern Washington’s desert climate and long summer heat waves.

Homeowners across the Columbia Basin trust our local team for honest recommendations, system evaluations, and long-term cooling solutions. Financing options are available for larger repair or replacement projects.

To schedule service or learn more about cooling solutions for your home, contact us today.