Killeen's summers are among the most demanding for air conditioning systems anywhere in the country. With weeks of temperatures above 95°F and humidity that makes it feel even hotter, your AC runs almost continuously from late May through September. These five tips will help you get through the season without a breakdown.
1. Change Your Filter Every 30 Days During Summer
This is the single most impactful thing you can do, and it costs less than $10. During Killeen's summer, your AC runs nearly constantly, pulling large volumes of air through the filter every hour. A clogged filter restricts airflow, causing your evaporator coil to get too cold and potentially freeze solid, which shuts down your system completely.
Set a phone reminder on the 1st of each month from May through September. Keep a few filters on hand so you never skip a change. Use a MERV 8 filter: it filters effectively without restricting airflow the way MERV 11 or 13 filters can in older systems.
2. Keep the Outdoor Unit Clear and Clean
Your condenser unit (the outdoor box) rejects heat from your home to the outside. To do this, it needs good airflow around all four sides. During summer, check it regularly:
- Clear any grass, weeds, or vines growing against the unit
- Keep at least 2 feet of clearance on all sides
- After storms, check for debris (leaves, sticks) packed into the fins
- Gently rinse the fins with a garden hose if they're clogged with cottonwood or dust
A dirty condenser unit can reduce cooling efficiency by 20 to 30 percent, meaning higher electric bills and more strain on the compressor. Professional AC service in Killeen.
3. Set Your Thermostat Strategically
Many Killeen homeowners try to cool their home to 68°F or 70°F during peak afternoon heat. The problem: when it's 100°F outside, your AC may simply not be able to maintain that temperature without running continuously for hours, straining the system.
Better approach: set the thermostat to 76°F to 78°F during peak afternoon hours (2 PM to 6 PM) and let ceiling fans help with perceived comfort. Use a programmable or smart thermostat to automatically raise the temperature when you're away and cool down before you return. Every degree you raise the thermostat saves 6 to 8 percent on cooling costs.
4. Check Your Condensate Drain Line Monthly
Your AC removes humidity from the air and drains that water through a condensate drain line. In Killeen's humid summer climate, these drain lines clog with algae regularly. When they clog, the water backs up into the overflow pan and eventually into your ceiling or walls.
Locate your drain line access point (usually a PVC pipe near the air handler with a cap) and pour a cup of distilled white vinegar down it monthly. This kills algae before it can form a clog. If you see water in the overflow pan or notice your system shutting off unexpectedly, the drain line is likely clogged. HVAC maintenance service.
5. Schedule a Professional Tune-Up Before June
Ideally, professional AC maintenance happens in April or May, before the Texas heat arrives and before HVAC schedules fill up. A proper tune-up includes:
- Checking refrigerant charge and testing for leaks
- Cleaning evaporator and condenser coils
- Testing capacitors and contactors (the parts that fail most in summer heat)
- Measuring supply and return air temperatures to verify system efficiency
- Inspecting electrical connections and testing starting components
Capacitors are the number one AC failure point in Killeen summers. They degrade quickly under the heat load, and replacing them proactively costs $150 to $200. A capacitor failure that leaves you without AC for two days in July costs far more than that in discomfort and emergency service rates.
One More Thing: Know Your Emergency Protocol
If your AC stops cooling on a hot day, before you call for service:
- Check the filter: a frozen coil from a clogged filter is the most common cause of sudden cooling failure
- Check the breakers: a tripped breaker is the second most common cause
- Turn the system off for 30 minutes to let a frozen coil thaw, then restart
If none of those fix it, call A Better Handyman at (877) 519-9702. We prioritize same-day or next-day service for cooling failures in Killeen and the Fort Cavazos area.