What to Do When Your AC Stops Working

There's nothing worse than your AC going out in the middle of a Fresno heatwave. Before you panic, work through these 10 steps — most AC problems have a simple fix, and knowing what to check first can save you time and money.

Step 1: Check the Thermostat

Start simple. Make sure your thermostat is set to Cool and the target temperature is lower than the current room temperature. If it runs on batteries, swap them out — a dead battery is a surprisingly common culprit.

Step 2: Inspect the Circuit Breakers

AC units draw a lot of power, especially on hot days. Head to your breaker panel and look for any tripped breakers. If you find one, reset it and see if the system comes back on. If it trips again shortly after, stop resetting it — that's a sign of an electrical issue and it's time to call a pro.

Step 3: Check the Air Filter

A clogged filter is one of the most common reasons AC units underperform or shut down entirely. Pull it out and hold it up to the light — if you can't see through it, replace it. A fresh filter takes about two minutes and costs a few dollars.

Step 4: Make Sure Vents Are Open

Walk through your home and check that all supply and return vents are open and unblocked. Furniture, rugs, and curtains can restrict airflow enough to cause the system to ice up or shut off. Vents should stay open in every room — even ones you don't use.

Step 5: Look for Ice on the Unit

Ice on the evaporator coil or refrigerant lines is a red flag. If you spot it, turn the system off (fan only is fine) and let it melt completely before restarting. If it ices back up, there's an underlying issue — low refrigerant or restricted airflow — that needs a technician.

Step 6: Listen for Odd Noises

Clicking, buzzing, grinding, or screeching sounds all mean something specific is wrong. Turn the system off to prevent further damage and make note of what you heard — it helps the technician diagnose faster when they arrive.

Step 7: Check the Drain Line

Your AC pulls moisture out of the air, and that water drains through a condensate line. If that line gets clogged, the system may shut itself off as a safety measure. Look for a small PVC pipe near the indoor unit and clear any visible blockage with a wet/dry vac.

Step 8: Call a Professional

If none of the above steps solved it, it's time to bring in an expert. A licensed HVAC technician has the tools to check refrigerant levels, test electrical components, and find problems that aren't visible to the eye.

Step 9: Stay Cool While You Wait

While you're waiting for help, close blinds and curtains to block out heat, run ceiling fans (they make a room feel 4–6°F cooler), and stay hydrated. A portable AC or window unit can take the edge off in the meantime.

Step 10: Plan Ahead for Next Summer

Once your AC is running again, set up a maintenance visit before the next cooling season. Regular tune-ups catch small problems before they become expensive repairs — and they keep your system running at peak efficiency when you need it most.

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Balanced Comfort serves Fresno, Clovis, Madera, and the Central Valley. If your AC is down, we offer same-day and next-day appointments. Book online or call 559-234-4131.