Residential & Commercial Furnace Repair

Welcome to DNR Refrigeration, Heating & AC, the distinguished leader in furnace repair in San Antonio, TX. As your premier destination for heating solutions, we take pride in our specialized expertise in diagnosing and rectifying a comprehensive range of furnace issues. Our commitment is unwavering – we ensure optimal heating solutions for both residential sanctuaries and bustling commercial spaces alike. At DNR Refrigeration, your comfort stands as the cornerstone of our mission.

Our dedicated team at DNR Refrigeration brings forth a wealth of experience and proficiency in the realm of furnace repair services. We understand that each home or business has unique heating requirements, and we tailor our services to cater to these distinctive needs. Whether you’re grappling with a sudden furnace breakdown or dealing with a persistent issue, our seasoned experts stand ready to restore warmth to your surroundings promptly and effectively.

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Common Furnace Problems

DNR Refrigeration, Heating & AC repairs a furnace at a local home

No Heat

Diagnosis: Our skilled technicians excel at identifying and addressing issues causing a lack of heat in your home or business.

Resolution: Whether it's a faulty thermostat, ignition system malfunction, or other issues, we have the expertise to restore consistent heat.

Strange Noises

Diagnosis: Unusual sounds from your furnace can indicate underlying problems. Our team conducts thorough inspections to pinpoint and address the source of these noises.

Resolution: From banging and clanking to whirring and squealing, we have the knowledge and tools to eliminate disruptive furnace sounds for a quieter operation.

Pilot Light Issues

Diagnosis: A malfunctioning pilot light can lead to heating issues and safety concerns. Our technicians specialize in diagnosing pilot light problems accurately. Resolution: Whether it's a thermocouple issue, gas supply problem, or other issues affecting the pilot light, we provide expert solutions to ensure a safe and reliable furnace operation.

Swift emergency furnace repair service available 24/7 for your convenience.

Inefficient Heating

Diagnosis: If your furnace is struggling to maintain consistent warmth, our diagnostic process includes assessing factors such as the heat exchanger, ductwork, and overall system efficiency. Resolution: We address inefficiencies by repairing or replacing components, optimizing airflow, and conducting necessary adjustments to enhance overall heating performance.

Why Choose Us?

Round the Clock Fast Service

Assured Quick Repair Service

Professional and Certified Expert Team

100% Guaranteed Satisfaction

5-Star Furnace Repair Company Serving San Antonio & Surrounding Areas

When your AC unit stops blowing cool air, rely on DNR Refrigeration, Heating & Cooling’s refined repair process perfected through extensive experience serving San Antonio area customers:


Reach out to us today to schedule a service appointment, and our friendly team will assist you promptly, ensuring your furnace gets the attention it needs.


Our skilled technicians employ advanced diagnostic tools to pinpoint the exact issues affecting your furnace, providing an accurate assessment for efficient repairs.


Receive a transparent and detailed estimate outlining the necessary repairs, ensuring you have a clear understanding of the scope and cost before we proceed.


Our expert team swiftly and skillfully executes the necessary repairs, employing industry-leading techniques to restore your furnace to optimal functionality.

Test & Clean

After repairs, we conduct thorough testing to ensure your furnace operates seamlessly. Our meticulous cleaning process guarantees a well-maintained system, promoting longevity and efficiency.

Our technicians average many years of hands-on AC repair experience. And no matter the brand or age, we likely service it and can source quality replacement parts locally to get your system running optimally again. Schedule Furnace Repair or Maintenance services today!

Repair Services Offered

Emergency HVAC Repair in San Antonio

At DNR Refrigeration, we pride ourselves on offering a comprehensive range of furnace repair services to address various issues and ensure the optimal performance of your heating system. Our commitment to excellence extends to every facet of furnace repair. Here’s a breakdown of the specialized services we provide:

Ignition System Repair:

  • Expert diagnosis and repair of issues affecting the furnace’s ignition system, ensuring efficient and reliable operation.

Thermostat Replacement:

  • Upgrading and replacing outdated or malfunctioning thermostats to enhance temperature control and overall system efficiency.

Heat Exchanger Fixes:

  • Diagnosis and repair of heat exchanger issues, preventing heat loss and ensuring the safe and efficient transfer of warmth.

Blower Motor and Fan Repairs:

  • Comprehensive inspection and repair of the blower motor and fan components, vital for maintaining proper airflow and temperature distribution.

Ductwork Inspection and Repairs:

  • Thorough examination of ductwork to identify and address any issues affecting airflow, including leaks, blockages, or inefficient distribution.

Pilot Light Troubleshooting:

  • Expert diagnosis and repair of pilot light issues, ensuring proper ignition and enhancing the safety of your furnace.

Gas Valve Replacement:

  • Replacement and calibration of gas valves to address issues related to gas flow, pressure, and overall combustion efficiency.


Electrical Component Repairs:

  • Specialized services for repairing or replacing faulty electrical components, such as wiring, sensors, and safety controls.

System Calibration and Adjustment:

  • Precise calibration and adjustment of furnace settings to optimize performance, improve energy efficiency, and enhance overall functionality.

Emergency Repairs:

  • Swift and efficient emergency furnace repairs to address sudden breakdowns, ensuring minimal disruption and restoring warmth promptly.

Annual Maintenance Services:

  • Proactive maintenance plans to prevent potential issues, prolong the lifespan of your furnace, and maintain peak performance throughout the year.

Efficiency Upgrades:

  • Recommendations and implementation of efficiency upgrades, including the installation of energy-efficient components to reduce energy consumption and lower utility costs.

At DNR Refrigeration, our commitment is to provide transparent, efficient, and reliable furnace repair services. Whether you’re dealing with a specific issue or seeking preventive maintenance, our comprehensive range of services is designed to meet your unique heating needs. Your comfort and satisfaction are our top priorities.

DNR Refrigeration, Heating & AC helps homeowner with heater not producing heat repair service

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We recommend annual furnace maintenance to ensure optimal performance. Regular servicing helps identify and address potential issues before they become major problems, extending the lifespan of your system.

Look out for warning signs such as inconsistent heating, unusual noises, increased energy bills, or frequent cycling. If you notice any of these issues, it’s advisable to schedule a diagnostic check to prevent further damage.

While simple tasks like checking the thermostat settings or changing air filters can be done by homeowners, complex issues should be handled by professionals. Attempting DIY repairs on intricate components may lead to further damage and safety hazards.

Regular maintenance, including cleaning or replacing air filters, ensures optimal airflow. Additionally, consider upgrading to a programmable thermostat and sealing duct leaks to enhance energy efficiency and reduce utility costs.

Our technicians assess the condition of your furnace during diagnostic checks. If the repair costs are significant, upgrading to a newer, more energy-efficient model might be more cost-effective in the long run. We provide transparent recommendations based on the condition of your system.