AC Acting Up in Rockwall? Here’s What to Check First

It’s the middle of summer in Rockwall, Texas, and your air conditioning system decides to take a break — right when you need it most. At D-N-D Services, we’ve seen it all since 1997, and we know how frustrating AC problems can be. Before you panic or assume you need a brand-new unit, here are a few things you can check first. Sometimes, the fix is simpler than you think.

1. Check Your Thermostat Settings

This may sound obvious, but many AC issues start with the thermostat. Make sure it’s set to “cool” and that the temperature is set below the current room temperature. If it’s battery-operated, low batteries could be the culprit. Swap them out and see if that fixes the issue. Also, check if it’s in programmable mode and set correctly.

2. Inspect Your Air Filter

One of the most common causes of AC issues is a dirty air filter. A clogged filter restricts airflow, making your system work harder and less efficiently. If it’s been more than a month or two since you changed your filter, it’s time for a replacement. Clean filters not only help with performance but also improve indoor air quality — something we take seriously at D-N-D Services.

3. Check Your Circuit Breaker

Sometimes, an air conditioning unit will trip the circuit breaker, especially during power surges or extreme heat. Head to your electrical panel and make sure the breaker connected to your HVAC system hasn’t been tripped. Flip it off and back on again to reset it. If it trips repeatedly, it’s time to call in a licensed technician.

4. Look at the Outdoor Unit

Your AC’s outdoor condenser unit plays a critical role in keeping your home cool. Make sure it’s free from debris, leaves, grass clippings, and dirt. Restricted airflow in the condenser can cause overheating or inefficiency. Gently rinse it with a hose (never a pressure washer), but if you’re unsure or notice ice or strange noises, give D-N-D Services a call.

5. Check for Airflow Issues Indoors

Walk around your home and make sure your air vents aren’t blocked by furniture, rugs, or drapes. Closed or obstructed vents can throw off the balance of your HVAC system and reduce its effectiveness. If certain rooms feel warmer or cooler than others, your ductwork may need inspection or cleaning — a service we specialize in.

6. Listen for Unusual Noises

Your AC should hum quietly in the background, not clunk, squeal, or grind. Strange noises could indicate anything from a loose belt to a failing motor. If you notice anything out of the ordinary, turn off the system and reach out to D-N-D Services before the problem worsens.

Why Choose D-N-D Services?

1. Family owned and operated since 1997 
2. A+ rating with the Better Business Bureau 
3. Texas licensed and insured HVAC contractor 
4. Experts in residential and commercial HVAC 
5. Duct cleaning, retrofits, energy audits & more

Conclusion

If you’ve checked these basics and your AC is still acting up, it’s time to bring in a certified professional. At D-N-D Services, our NATE-certified technicians are trained to work on all major HVAC brands, including Carrier, Trane, Lennox, Goodman, and more. We don’t just fix problems — we find the most cost-effective and long-lasting solutions for your comfort.

We proudly serve Rockwall and the surrounding areas including Rowlett, Garland, Greenville, Heath, and Dallas. Whether it’s a quick repair, system inspection, or full installation, we’re here to make your home or business cool and comfortable again.

Give D-N-D Services a call today for fast, honest, and professional HVAC service you can trust.