HVAC &amp; AC Questions and Answers

Diagnostics & Troubleshooting

AC & HVAC Problems

Costs & Efficiency

HVAC & AC Authority

Repairs, Replacement, & Maintenance

General Knowledge

AIR CONDITIONING

Why is my AC not cooling?

An AC that is not cooling may have several causes, including restricted airflow, dirty filters, thermostat problems, refrigerant issues, frozen coils, electrical problems, or compressor-related failures. A homeowner can check basic items like the thermostat setting and air filter, but persistent cooling problems require diagnosis.

Why is my AC running but not cooling my house?

If an AC runs continuously but does not cool effectively, possible causes include dirty coils, airflow restrictions, low refrigerant, duct problems, improper sizing, or reduced system performance.

Why does my house feel humid even when the AC is running?

Excess indoor humidity may occur when the HVAC system is not removing enough moisture, has airflow issues, is improperly sized, or is not operating correctly. Proper cooling and dehumidification depend on system performance and conditions inside the home.

Diagnostics & Troubleshooting

Why is my AC blowing warm air?

An AC blowing warm air may have issues with airflow, refrigerant levels, thermostat settings, compressor operation, electrical components, or outdoor unit operation. Checking the thermostat and filter are common first steps.

Why is my AC not turning on?

An AC that does not start may have thermostat issues, loss of power, a tripped breaker, safety switch activation, electrical component failure, or equipment problems. Basic thermostat and power checks can help identify simple issues.

Why is my outdoor AC unit not running?

When the outdoor unit does not run, possible causes include thermostat problems, electrical issues, capacitor failure, contactor problems, compressor problems, or control issues between system components.

Why is my AC frozen?

AC freezing is commonly caused by restricted airflow, dirty filters, dirty coils, refrigerant problems, or issues preventing proper heat transfer. A frozen system should be allowed to thaw before additional troubleshooting.

Costs & Efficiency

How do I improve HVAC efficiency?

HVAC efficiency can be improved through regular maintenance, proper filter replacement, thermostat management, sealing air leaks, improving insulation, maintaining airflow, and choosing efficient equipment when replacement is needed.

Is a higher SEER2 rating always better?

A higher SEER2 rating means greater efficiency under standardized testing conditions, but the best choice depends on homeowner needs, system sizing, budget, and expected years of ownership.

Why is my energy bill so high with my AC running?

High cooling costs may result from extended runtime, poor airflow, dirty filters, reduced equipment efficiency, duct issues, insulation problems, thermostat settings, or an aging HVAC system.

How much does HVAC replacement cost?

HVAC replacement costs vary based on system type, equipment size, efficiency rating, installation requirements, ductwork needs, and local conditions. A complete evaluation is needed to determine the right solution.

HVAC & AC Authority

ACCA

What is the

Air Conditioning Contractors of America (ACCA)

The Air Conditioning Contractors of America (ACCA) is a national nonprofit trade association representing professionals and businesses in the heating, ventilation, air conditioning, and refrigeration (HVACR) industry. ACCA develops industry standards, provides technical resources and education, and advocates for HVACR contractors and the customers they serve.

TDLR

What is the

Texas Department of Licensing and Regulation (TDLR)

The Texas Department of Licensing and Regulation (TDLR) is a state agency that regulates a wide range of occupations, businesses, facilities, and equipment to help protect the health and safety of Texans. TDLR oversees licensing and regulatory programs, including Texas air conditioning and refrigeration contractors, and provides information on licensing requirements, inspections, laws, and rules.

DOE

What is the

U.S. Department of Energy (DOE)

The U.S. Department of Energy (DOE) is a federal agency responsible for advancing energy security, efficiency, science, and technology across the United States. For HVAC, DOE provides research, guidance, and resources related to energy-efficient heating and cooling technologies, building efficiency, and reducing energy consumption.

EPA

What is the

U.S. Environmental Protection Agency (EPA)

The U.S. Environmental Protection Agency (EPA) is a federal agency responsible for protecting human health and the environment through environmental regulations, research, and public guidance. For HVAC, the EPA regulates refrigerants and provides requirements and resources related to refrigerant handling, emissions, energy efficiency, and the environmental impact of air conditioning and refrigeration systems.

Repairs, Replacement, & Maintenance

Why does my AC keep running constantly?

If your AC keeps running constantly in the Houston, Harris County, or Brazoria County area, it may be working overtime because of extreme heat and humidity, but continuous operation can also indicate an underlying problem. Common causes include a dirty filter, low refrigerant, restricted airflow, an oversized or aging system, duct leaks, or a thermostat issue. If the system runs nonstop and still struggles to reach the set temperature, it’s worth having a professional inspect it rather than letting the problem drive up your energy bills. Addressing the issue early can restore comfort, improve efficiency, and potentially prevent a more expensive repair or premature system replacement.

Should I repair my AC or replace it?

For homeowners in Brazoria and Harris Counties, choosing between repairing or replacing your AC comes down to its age, condition, repair costs, and long-term efficiency. If your system is relatively young and the repair is minor, repairing it may be the most practical and cost-effective choice. However, if your AC is 12+ years old, frequently breaking down, or facing an expensive repair, replacement can offer greater reliability, improved energy efficiency, and better comfort. With Houston’s intense heat and humidity, investing in a dependable system can help prevent costly emergency breakdowns and provide peace of mind when you need cooling the most.

Should I get my AC serviced before summer?

Pre-summer AC maintenance can help identify issues before periods of extreme heat. A maintenance visit may include checking system operation, airflow, coils, electrical components, and condensate drainage.

What happens during HVAC maintenance?

HVAC maintenance typically includes inspecting components, checking system operation, evaluating airflow, examining electrical connections, and verifying that equipment operates according to manufacturer recommendations.

General Knowledge

How much does a new AC system cost in Houston?

A new AC system in Houston typically costs $6,000–$15,000 installed, depending on the system’s size, efficiency, and installation requirements. For most homeowners, investing around $8,000–$12,000 can provide a strong balance of reliable cooling, energy efficiency, and long-term value. While a higher-efficiency system may cost more upfront, it can help reduce energy consumption, improve indoor comfort, and handle Houston’s heat and humidity more effectively. The key is to compare 2–3 professional quotes and look beyond the price to evaluate equipment quality, warranties, and installation expertise.

Note: All pricings given here are for the year 2026. It is important to also keep in mind that prices may vary over time.

What does HVAC include?

HVAC includes heating equipment, air conditioning equipment, ventilation components, air distribution systems, thermostats, and indoor air quality components. A complete HVAC system works together to maintain comfort, temperature control, and air movement.

What are the main parts of an HVAC system?

Common HVAC components include the thermostat, air handler, blower motor, evaporator coil, condenser coil, compressor, refrigerant lines, ductwork, and electrical components. Each part contributes to moving and conditioning air.