It's 10 o'clock on a Tuesday night. You're in San Antonio in the middle of summer. The house is already at 85 degrees and your AC just died. Your first instinct is to grab your phone and call someone.

Hold on for two minutes.

Before you call for emergency AC repair, there are four quick checks that could save you a service call — and a few hundred dollars. We've been doing HVAC in San Antonio for over 14 years, and a surprising number of the "my AC stopped working" calls we get are fixed in under five minutes with no parts needed.

Step 1: Check Your Breaker Box

Your AC runs on a dedicated circuit. When your AC draws more power than the circuit can handle, the breaker trips. Go to your electrical panel, find the breaker labeled "AC" or "HVAC," flip it all the way OFF, then firmly back ON. Wait 30 seconds, then try your thermostat.

If the breaker trips again within a few minutes, stop resetting it. Repeated trips mean there's an electrical fault — that's a job for a licensed tech.

Step 2: Replace Your Thermostat Batteries

If the batteries are dead, the thermostat can't send the signal to turn on, and your AC sits there doing nothing. Swap the batteries for fresh ones. It's a two-minute fix that homeowners overlook constantly.

Step 3: Check Your Air Filter

A clogged air filter can actually shut your system down. When airflow is restricted, your evaporator coil freezes over and the system stops working entirely. Pull it out and hold it up to the light. If you can't see through it, replace it and wait 30 minutes before turning the system back on.

Step 4: Inspect the Outdoor Unit

Check: Is the disconnect switch connected? Is there debris blocking airflow? Is the fan spinning? If the unit is humming but the fan isn't turning, you likely have a failed capacitor.

Real Emergency vs. Something That Can Wait Until Morning

Call immediately: electrical burning smell, water leaking indoors, loud grinding/banging, anyone elderly or infant in the home.

Can wait until morning: AC running but cooling slowly, cycling more than usual, weaker airflow.

What Emergency AC Repair Costs in San Antonio

• Capacitor replacement: $150-$300
• Refrigerant recharge (R-410A): $200-$500
• Contactor or relay replacement: $150-$250
• Emergency diagnostic + minor repair: $200-$400

We don't add after-hours surcharges. You pay for the repair, not the hour on the clock.

How to Avoid Emergencies in the First Place

Regular maintenance prevents roughly 95% of emergency AC breakdowns. A spring tune-up before summer is the single best thing you can do.

FAQ

How quickly can you respond to an emergency AC call in San Antonio?

We offer same-day service on emergency calls and are available 24/7.

Do you charge extra for after-hours or weekend service calls?

No. You pay for the work done, not the time of day.

Can I run my AC if I see ice on the refrigerant lines?

No. Turn the system off and call. Running the AC with ice on the lines can burn out the compressor, turning a $300 repair into a $2,000+ problem.

AC Broke Down in San Antonio? We're Here 24/7.

Call (210) 535-1515 — available 24/7 for emergency AC repair in San Antonio.