Summer AC Prep Checklist

Before peak Valley heat arrives, run through six things: replace the filter, clear the outdoor unit, check the condensate drain, test the thermostat, listen for odd noises, and book a professional tune-up. Five take minutes; the last one is your safety net.

What can I do myself in an afternoon?

Five quick steps handle the bulk of summer prep:

1. Replace the air filter. The single most important DIY step — a clogged filter starves airflow and is the most common cause of a system that ices over. In dusty South Texas, check it monthly all summer.
2. Clear the outdoor condenser. Cut plants back about two feet and gently rinse the fins from the outside with a hose (power off first) so the unit can shed your home's heat.
3. Check the condensate drain. Your AC pulls gallons of moisture from our humid air; if the drain clogs it can back up, trip a safety switch, or cause water damage. Confirm it's draining and the pan is clear.
4. Test the thermostat. Set it to Cool a few degrees below room temperature and confirm the system starts and actually cools. Load your summer schedule and replace the batteries if it uses them.
5. Listen and watch on the first run. Grinding, buzzing, weak airflow, or a musty smell are early warnings — catching them in spring beats an emergency call in July.

Why do the filter and drain matter so much here?

Two reasons specific to the Valley. First, our air is dusty, so filters load up fast and choke airflow — the leading cause of a frozen coil (here's why your AC freezes up). Second, our humidity means the system condenses a lot of water, so a healthy drain line is what keeps that water headed outside instead of onto your floor.

What still needs a professional?

The DIY steps go only so far — refrigerant pressures, electrical connections, and capacitor testing need a licensed technician. See exactly what's in an AC tune-up, and keep up the year-round tasks on our AC maintenance checklist.

What's the easiest way to never miss it?

Let us track it for you. Our VIP Membership includes two professional tune-ups a year, 15% off all repairs, a $0 service-call fee on approved repairs, and priority scheduling for $125 a year — so your system is ready before the first triple-digit week, every year.