Why is my AC not turning on?

Check your thermostat settings, circuit breaker, and air filter. If the system still won’t power on, it could be a capacitor or contactor issue that requires a professional.

How can I fix poor airflow from my vents?

First, check for dirty or clogged air filters. Then inspect vents and ducts for obstructions. If airflow is still weak, schedule a duct inspection.

What causes my AC to blow warm air?

This could be caused by a dirty evaporator coil, low refrigerant, or an issue with the compressor. Check your filter first and then call a technician if needed.

Can I clean my AC unit myself?

You can clean or replace filters and clear debris around the outdoor unit. However, coil cleaning and electrical inspection should be handled by professionals.

When should I call a professional?

If your system doesn’t respond to basic troubleshooting, makes unusual noises, leaks, or fails to cool properly, call a certified HVAC technician.

DIY AC Troubleshooting Tips for Salem Homeowners

July 31, 2025

Tagged:
Troubleshooting

When your AC stops cooling properly, frustration builds quickly, especially during Salem's warmer months. However, before calling a technician to resolve your problem, you can try several troubleshooting steps to resolve the issue yourself if possible. This guide from Four Seasons can help you diagnose some common problems, restore your comfort, and know when it's time to call in our experts for some extra assistance.

DIY troubleshooting tips for some common AC issues include:

Check your thermostat settings
Inspect your air filter
Confirm power and circuit breaker status
Look for signs of frozen coils
Assess airflow and register blockages

Many AC problems have simple fixes you can handle on your own with a bit of know-how. Use the following guide to troubleshoot common issues and help restore superb comfort to your Salem home. Alternatively, sign up for our maintenance plan to keep your system running optimally year-round.

Book Expert AC Repair With Four Seasons!

If you've gone through these troubleshooting steps and your AC still doesn't cool your home correctly, our team is ready to help. Since 1979, Four Seasons has delivered good old-fashioned service backed by hundreds of 5-star reviews and fair, honest pricing. Contact us today for fast, convenient AC maintenance scheduling with 2-hour appointment windows.

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Check Your Thermostat Settings

Start simply — your thermostat controls your entire air conditioning system. First, ensure the temperature is set to cool and lower than the current room temperature. If the fan is on, air may blow even when the system doesn't actively cool your home. Setting the system to Auto ensures the fan runs only during cooling cycles. If you have a battery-powered thermostat, check and replace the batteries if needed. Smart thermostats may require a reboot, so check the app for any error notifications that might indicate a problem.

Inspect Your Air Filter

A clogged or dirty air filter can make your home uncomfortable and create indoor air quality issues. If your filter looks visibly dirty or you haven't changed it in the last 30 to 60 days, replace it immediately. Rinse any reusable filters thoroughly, and let them dry completely before adding them back to your AC system. Because Oregon experiences seasonal pollen and allergens, consider using a filter rated for high pollen control to keep your system running smoothly and improve your indoor air quality.

Confirm Power and Circuit Breaker Status

If your AC doesn't turn on, verify it's receiving power. Check the unit's indoor plug and outdoor disconnect box to ensure they receive power, and inspect your home's circuit breaker panel. A tripped breaker can cause issues, so reset it by switching it on, off, and back on again if it's flipped to the off position. If the breaker continues to trip after resetting it, it could indicate a more serious electrical problem that requires professional attention. Remember: safety first. If you're unsure, wait for one of our knowledgeable technicians to diagnose the issue safely and accurately.

Look for Signs of Frozen Coils

Frozen evaporator coils often cause your air conditioner to fill your home with warm air or stop cooling altogether. Inspect your unit for ice buildup on the coils or refrigerant lines to see if your AC is freezing. If you see ice, turn the system off and allow it to thaw completely (this often takes several hours). After it thaws, inspect your air filter and ensure clear ventilation. Contact Four Seasons for a comprehensive evaluation of your AC system if the freezing persists after taking these steps.

Assess Airflow and Register Blockages

Check every vent and register in your home to ensure they're open and unobstructed. Furniture, rugs, or dust buildup can restrict airflow, making it seem like your AC isn't working correctly. Blocked airflow can strain your system, potentially leading to bigger issues. If you hear unusual noises from your unit or notice weak airflow even after clearing any obstructions, consider a thorough evaluation from one of our NATE-certified professionals.

Keep Your System in Top Shape With Regular Maintenance!

Preventative AC maintenance keeps your cooling system operating at peak efficiency and helps you avoid costly repairs. Our expert tune-ups include detailed inspections, cleanings, and adjustments that can extend the life of your AC. Best of all, every service comes with Four Seasons' 100% satisfaction guarantee. Don't wait for a breakdown. Schedule seasonal maintenance with Four Seasons today.