Step 1: Check the "Invisible Wall" (Your Air Filter)
Believe it or not, the most common reason an AC stops cooling isn't a broken motor—it’s a dirty filter. When your filter is clogged with dust and pet dander, it creates a literal wall that prevents air from reaching your cooling coils.
- The Symptom: Weak airflow or ice forming on the indoor unit.
- The Fix: Locate your filter and hold it up to the light. If you can’t see through it, replace it.
- Mayster Tip: In our dusty PNW summers, we recommend checking your filter every 30 days.
Step 2: Inspect the Outdoor "Breathing Space"
Your outdoor unit (the condenser) needs to "breathe" to release the heat it pulled from your house. If it’s crowded by overgrown blackberry bushes or covered in cottonwood fluff, it will struggle to cool.
- The Symptom: The unit is running constantly but the air inside feels lukewarm.
- The Fix: Clear at least two feet of space around your outdoor unit. Gently rinse the metal "fins" with a garden hose (never use a pressure washer!) to remove dirt and salt air buildup.
Step 3: Verify Your Thermostat Settings
It sounds simple, but check your thermostat. Ensure it is set to
"Cool" and the fan is set to
"Auto" rather than "On." If the fan is set to "On," it will blow air through your house 24/7, even when the cooling cycle isn't running, making the air feel warm.
When to Call the Pros (The "Red Flags")
If you’ve checked the filter and the outdoor unit and you're still sweating, the issue is likely more technical. In 2026, modern systems (especially the
Bryant Evolution™ units we specialize in) have complex sensors that require a pro.
1. You Hear Hissing or Bubbling
This usually indicates a
refrigerant leak. Since the new 2026 refrigerant standards (R-454B) are now in effect, these systems require specialized tools and certification to repair safely.
2. The Outdoor Unit is Shaking or Clanging
This could be a failing capacitor or a loose fan blade. Turning the system off immediately can prevent a small $200 repair from turning into a $2,000 compressor replacement.
3. Frozen Coils
If you see ice on the copper pipes leading to your unit,
turn it off immediately. Running a "frozen" system can burn out your motor.
Mayster Heating & Air: Your Local Cooling Experts
Whether you’re on the Peninsula or in the heart of Lakewood, don't spend another afternoon in a hot house. Our team is trained to diagnose your system quickly and get your home back to the perfect temperature.
Is your AC still blowing warm air?
Call Mayster today at
(206) 492-4215 to
Schedule a maintenance!
