When the temperatures dip in San Antonio, TX, the last thing any homeowner wants is a broken furnace. A malfunctioning heating system can cause major discomfort and even pose safety risks if left unaddressed. While there are a few quick steps you can take to troubleshoot minor issues, the most important thing you can do is call the trusted professionals at ASC Heating & Air for expert furnace repair, replacement, or installation services in San Antonio, Texas.

Step 1: Check the Basics
Before assuming your furnace has completely failed, start with a few basic checks. Make sure the thermostat is set to “heat” and that the temperature setting is above the current room temperature. If the thermostat runs on batteries, replace them to rule out a simple power issue.
Next, check the breaker panel. A tripped circuit breaker can easily cut power to the furnace. If you find the breaker has tripped, reset it once and monitor the furnace. If it trips again, that is a sign of a deeper electrical issue that should only be handled by a professional HVAC technician.
Also, ensure your air filter is not clogged. Dirty filters restrict airflow, causing the furnace to overheat or shut down prematurely. Replacing your filter regularly can help prevent unnecessary breakdowns and improve efficiency year-round.

Step 2: Listen and Observe
When your furnace is not working as it should, it can often give warning signs. Pay attention to strange noises, such as banging, rattling, or squealing, which could indicate a mechanical problem or loose components. Likewise, if you notice uneven heating or cool air blowing from the vents, your system may be struggling with a failing blower motor or ignition issue.
While it is good to take note of these symptoms, it is best not to try and fix them yourself. Furnaces involve complex electrical and gas components that require the expertise of a certified HVAC technician to inspect and remedy safely.

Step 3: Check for Error Codes or Warning Lights
Many modern furnaces display error codes or indicator lights that can help diagnose a problem. You can refer to your unit’s manual to identify what those codes mean. However, keep in mind that these are typically just starting points; a trained technician from ASC Heating & Air can accurately pinpoint and repair the underlying cause.
If your furnace is gas-powered, be sure to check for any signs of a gas leak, such as the smell of sulfur or rotten eggs. If you suspect a leak, turn off the furnace immediately, leave the home, and call your gas company or emergency services.

Step 4: Know When It Is Time to Call the Experts
If the above steps do not restore heat to your home, it is time to contact ASC Heating & Air. Our team of experienced HVAC technicians can help quickly diagnose a furnace issue and recommend the best solution — whether it is a furnace repair, replacement, or new installation.
Attempting DIY repairs can be dangerous and may even void your warranty. The professionals at ASC Heating & Air have the proper tools, training, and expertise to help safely restore your system to peak performance.

Step 5: Consider Furnace Replacement if Repairs Are Frequent
If your furnace is over 15 years old or requires frequent repairs, replacing it may be more cost-effective in the long run. ASC Heating & Air offers high-quality furnace installation services in San Antonio, TX, and can help you choose an energy-efficient system that fits your home and budget. Modern furnaces not only heat more efficiently but can also lower monthly utility costs and improve indoor comfort.
Call ASC Heating & Air for Furnace Repair in San Antonio, TX
When your furnace breaks, do not wait for the chill to set in; contact the professionals at ASC Heating & Air in San Antonio, Texas, for furnace repair. We can help homeowners stay warm and comfortable all winter long with fast response times, expert technicians, and a commitment to quality service.
At ASC Heating & Air, we are the trusted choice for reliable heating solutions in San Antonio. Contact us today to schedule your furnace service and get your home’s comfort restored quickly and safely.

