The Houston Summer HVAC Checklist

Do these monthly (May–September)

• Replace the air filter. A clogged filter is the #1 cause of weak cooling and frozen coils. In Houston's dust and humidity, monthly is right.
• Clear the outdoor unit. Keep two feet of space around it; gently rinse the fins with a hose.
• Check the condensate drain. A clogged drain line backs up water and can shut the system off (or damage a ceiling). A cup of vinegar down the line helps.
• Set a smarter schedule. A programmable or smart thermostat that eases back while you're out saves real money without cooking the house.

Warning signs to call a pro

• Ice on the refrigerant lines or coil — turn it off and call; running it frozen can damage the compressor.
• Warm air or weak airflow from the vents.
• A sudden jump in your electric bill with no weather change.
• Short cycling — the system turning on and off every few minutes.
• Strange smells or sounds.

Why summer timing matters

Houston HVAC companies get slammed the first 100-degree week, and emergency calls cost more. A spring or early-summer tune-up is cheaper than an August breakdown — and a good tech will catch a failing capacitor or low refrigerant before it strands you.

Next steps

Put a filter change on your calendar, rinse the outdoor unit this weekend, and book a maintenance visit before the peak. If anything on the warning list is happening now, don't wait.