Why is my furnace blowing cold air?

Cold air can be caused by a dirty air filter, tripped limit switch, failed pilot light/ignitor, or improper thermostat settings.

Why is my gas furnace blowing cold air instead of warm heat?

A furnace blowing cold air is often triggered by a dirty flame sensor, a tripped high-limit safety switch, a failed hot surface igniter, or a thermostat misconfiguration. Our technicians test gas pressure and electronic controls to restore heat safely.

How do I know if my furnace heat exchanger is cracked?

Warning signs of a cracked heat exchanger include soot buildup around burners, yellow burner flames instead of crisp blue flames, strange chemical odors, or frequent carbon monoxide alarm triggers. If suspected, shut off your gas valve immediately and call for emergency safety testing.

How long do residential gas furnaces last in Texas?

With annual autumn maintenance, high-quality gas furnaces last 15 to 20 years. Regular filter changes and electrical inspections prevent heat exchanger stress and extend equipment longevity.

What causes a burning smell when turning on the heater for the first time?

A faint burning odor during the first winter startup is normal—it is caused by accumulated dust burning off heating burners or heat strip elements. However, if you smell strong metallic burning, electrical smoke, or natural gas, turn off the system and request an immediate inspection.

What is the difference between a heat pump and a traditional gas furnace?

A gas furnace generates heat by burning natural gas or propane, delivering hot air rapidly during sub-freezing temperatures. A heat pump transfers ambient heat using refrigerant, operating at ultra-high energy efficiency during mild winter weather.

24/7 Emergency Service•Same-Day Service•Upfront Pricing•Certified HVAC Technicians

(877) 469-2270

Heating & Furnace Repair in Texas

Prompt heating repair for gas furnaces, electric air handlers, and heat pumps to keep your family warm during winter freezes.

Call Service Line: (877) 469-2270 Schedule Service

About Our Heating & Furnace Repair Service

When winter freezes hit Texas, a dependable heating system is crucial. Airnet HVAC offers fast, comprehensive heating repair for gas furnaces, electric furnaces, and heat pumps. Our NATE-certified technicians carry specialized tools and universal replacement parts to fix heating failures safely and quickly.

Key Benefits & Features

Safe gas ignition & carbon monoxide verification

Rapid heat recovery for cold homes

Lower heating gas & electricity usage

Peace of mind during sudden freezes

Our Methodology

Our Step-by-Step Process

1. Safety Check

We inspect gas valves, electrical connections, and heat exchanger integrity.

2. Diagnostic Testing

We pinpoint sensor faults, ignition errors, or motor failures.

3. Direct Repair

We install heavy-duty OEM parts to restore safe furnace operation.

Available for Fast Dispatch Across Our 6 Target Texas Cities

Select your target city to view localized area codes, response times, and technician dispatch info:

Dallas, TX ((214) / (469))Houston, TX ((713) / (281))Austin, TX ((512) / (737))Fort Worth, TX ((817) / (682))San Antonio, TX ((210) / (726))Plano, TX ((972) / (469))

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Residential Heating Repair Help

Professional advice for resolving heating system breakdowns, weak airflow, and unexpected winter issues.

Fast & Safe Diagnostic Help for Your Heating System

From carbon monoxide checks to electrical control fixes, our master technicians ensure your residential heating system operates safely and effectively all winter.

Request Heating Repair (877) 469-2270