The Top HVAC Repair Calls We Get in Rockwall (And Their Fixes)

Since 1997, D-N-D Services has proudly served Rockwall and its surrounding communities, providing expert HVAC repair and maintenance for residential and commercial properties. Over the years, we’ve noticed some common repair calls that come through our doors—and knowing these frequent issues and their solutions can help homeowners and businesses understand their HVAC systems better and even prevent costly breakdowns.

Here are the top HVAC repair calls we get in Rockwall and how our expert technicians fix them.

1. Air Conditioner Not Cooling Properly

One of the most frequent complaints, especially during Texas’ hot summers, is when the air conditioner runs but doesn’t cool effectively. This can be caused by several issues:

1. Dirty air filters: Clogged filters restrict airflow, reducing cooling efficiency. 
2. Low refrigerant levels: Refrigerant leaks or low charge prevent the system from cooling adequately. 
3. Dirty evaporator or condenser coils: Dust and debris buildup on coils reduce heat transfer. 

Fix: Our NATE-certified technicians begin with a thorough inspection, replacing or cleaning filters, checking refrigerant levels, and cleaning coils. If refrigerant is low, we locate and repair leaks before recharging the system. Regular maintenance prevents many of these problems.

2. HVAC System Running Constantly

When an HVAC system runs nonstop, it can lead to high energy bills and premature wear. This issue often arises from:

1. Incorrect system sizing: An undersized unit struggles to meet demand. 
2. Leaky or poorly insulated ductwork: Conditioned air escapes before reaching rooms. 
3. Thermostat problems: Malfunctioning or poorly placed thermostats give inaccurate readings. 

Fix: We perform professional load calculations (Manual J) to ensure your system is properly sized. Our team also inspects and seals ducts, improving airflow and efficiency. Additionally, we test and calibrate thermostats or recommend upgrades to programmable models for better control.

3. Heating System Not Producing Heat

When the temperature drops, nothing is more frustrating than your heater failing to warm your home or business. Common causes include:

1. Pilot light or ignition issues: In gas furnaces, a faulty pilot light or electronic ignition prevents startup. 
2. Dirty flame sensor: A dirty or faulty flame sensor causes the furnace to shut down for safety. 
3. Thermostat malfunctions: Incorrect settings or faulty wiring disrupt heating cycles. 

Fix: Our technicians diagnose and repair ignition issues, clean flame sensors, and troubleshoot thermostat problems to restore reliable heating.

4. Strange Noises from HVAC Unit

Unusual sounds such as banging, squealing, or rattling often indicate mechanical problems:

1. Loose or broken parts: Fan blades, belts, or motors can become loose or damaged. 
2. Debris in the system: Leaves or other debris lodged in the outdoor condenser. 
3. Compressor issues: Compressor failures often produce loud noises. 

Fix: We carefully inspect the system, tighten or replace worn parts, remove debris, and diagnose compressor health. Early detection and repair help avoid costly replacements.

5. Poor Indoor Air Quality

Many Rockwall residents call us about allergies, odors, or dust concerns. Poor indoor air quality often stems from:

1. Dirty ducts: Dust, mold, and allergens accumulate in ventilation systems. 
2. Humidity problems: Excess moisture encourages mold and mildew growth. 
3. Lack of air filtration: Inadequate or outdated filters fail to remove pollutants. 

Fix: We provide professional duct cleaning, install or upgrade air purification and filtration systems, and recommend humidity control solutions to improve the air you breathe.

Conclusion

Understanding the common HVAC issues in Rockwall and their fixes can empower you to make informed decisions about your system’s care. From cooling problems to poor indoor air quality, D-N-D Services is here to deliver prompt, professional repairs and maintenance to keep your HVAC system running smoothly year-round.

If your HVAC system is giving you trouble or it’s time for a maintenance check, contact D-N-D Services today. We’re just around the corner and ready to ensure your home or business stays comfortable, no matter the season.