24/7 Emergency Furnace Repair & Heater Installation — Fast, Reliable Service Since 2004
When Texas winter hits and your furnace fails, you need help fast. At LEX Air Conditioning & Heating, we've been keeping DFW families warm since 2004 with reliable, same-day heating repair and installation services. Whether it's a furnace that won't start on a freezing morning, a heat pump struggling to keep up, or a complete system replacement, our licensed technicians are ready to respond 24/7 across the entire Dallas-Fort Worth metroplex.
Based in Plano and serving everywhere from Dallas and Frisco to McKinney, Richardson, Carrollton, Garland, and Allen, we understand that Texas winters can be unpredictable. A sudden cold snap can turn a minor heating issue into a household emergency within hours. That's why we maintain a fleet of fully-stocked service vehicles and keep emergency technicians on call around the clock. Our average response time ranges from 10-15 minutes in Plano to 25-30 minutes in Dallas, ensuring you're never left in the cold for long.
We service all major heating system brands including Trane, Carrier, Lennox, Rheem, Goodman, Bryant, and more. Our NATE-certified technicians bring over 22 years of combined experience to every job, from simple thermostat repairs to complex furnace diagnostics. Every service call starts with a thorough inspection and upfront pricing—you'll know exactly what the repair will cost before we begin any work. No hidden fees, no surprises, just honest heating repair from a family-owned company you can trust.
Recognizing these warning signs early can prevent costly emergency repairs and keep your family safe.
The most urgent heating problem—when your furnace simply won't turn on. This could indicate ignition failure, thermostat issues, a tripped circuit breaker, or a faulty pilot light. If you smell gas, evacuate immediately and call 911, then contact us for emergency repair once it's safe to return.
Your system runs but doesn't produce enough warmth to heat your home adequately. Common causes include clogged air filters restricting airflow, ductwork leaks losing heated air before it reaches living spaces, aging heat exchangers losing efficiency, or an undersized system for your home's square footage.
Gas furnaces rely on a steady pilot light or electronic ignition to function. A pilot light that keeps going out, burns yellow instead of blue, or won't stay lit points to thermocouple problems, gas valve issues, or dangerous ventilation blockages that need immediate professional attention.
Banging, rattling, screeching, or whistling sounds are never normal. Banging often indicates delayed ignition (a potentially dangerous condition), rattling suggests loose components, screeching points to belt or motor problems, and whistling typically means restricted airflow or ductwork gaps.
When your heating system turns on and off too frequently without completing full heating cycles, it wastes energy and puts excessive wear on components. Short cycling usually stems from thermostat placement near heat sources, oversized equipment, clogged filters, or failing limit switches.
A sudden spike in winter heating costs without increased usage signals declining system efficiency. This could result from aging equipment losing efficiency, ductwork leaks wasting heated air, dirty coils or burners, refrigerant issues in heat pumps, or improper thermostat settings forcing the system to work harder.
When your thermostat display is blank, unresponsive, or shows temperatures that don't match the actual room temperature, your entire heating system becomes unreliable. Dead batteries are the simplest fix, but wiring problems, sensor failures, or outdated technology may require thermostat replacement.
This is a life-threatening emergency. If your carbon monoxide detector sounds, you notice flu-like symptoms that improve when you leave the house, see soot accumulation around your furnace, or smell unusual odors, evacuate immediately. Cracked heat exchangers and improper ventilation can leak this deadly, odorless gas into your home.
Experiencing any of these heating problems? Don't risk your family's comfort and safety.
Call for Same-Day Heating RepairFrom emergency repairs to new installations, we handle every aspect of home heating in the DFW metroplex.
Furnace failures don't follow business hours. Our emergency heating technicians respond around the clock, 365 days a year, to restore warmth to your home when you need it most. We arrive fully equipped to diagnose and repair most issues in a single visit.
Our certified technicians troubleshoot and repair all types of furnaces—gas, electric, and oil. We use advanced diagnostic tools to pinpoint problems quickly, from ignition failures and blower motor issues to heat exchanger cracks and gas valve malfunctions. Learn more about our furnace repair services.
Heat pumps are popular in Texas for their efficiency in mild winters, but they require specialized expertise when problems arise. We service all heat pump brands, addressing refrigerant leaks, reversing valve issues, defrost cycle problems, and compressor failures. Visit our heat pump services page for details.
When repair costs exceed the value of your aging system, replacement becomes the smarter investment. We help you select the right-sized, energy-efficient heating system for your home and budget, then provide expert installation with proper sizing calculations, ductwork assessment, and load analysis. Explore heater installation options.
Regular maintenance extends equipment life and prevents 95% of heating breakdowns. Our comprehensive tune-ups include cleaning burners and heat exchangers, testing safety controls, checking carbon monoxide levels, lubricating moving parts, and optimizing system performance before winter arrives.
Your thermostat is the command center for home comfort. We install, repair, and upgrade all thermostat types including traditional programmable models, smart WiFi thermostats like Nest and Ecobee, and zoned system controllers. Proper thermostat placement and calibration can reduce heating costs by 10-15%.
Gas heating systems require annual safety checks to prevent carbon monoxide leaks and fire hazards. Our thorough inspections examine heat exchangers for cracks, test ventilation systems, verify proper combustion, and ensure all safety controls function correctly.
Leaky or poorly insulated ductwork can waste 20-30% of heated air before it reaches your living spaces. We locate and seal duct leaks, add insulation to unconditioned spaces, and repair damaged sections to maximize heating efficiency and indoor comfort.
Some situations require immediate emergency response, while others can be scheduled during regular business hours.
Our 24/7 emergency line: (972) 466-1917
Schedule maintenance: Book Online or call during business hours
Not sure if it's an emergency? Call us at (972) 466-1917. We'll help you assess the situation and determine the appropriate response level. When in doubt, it's always safer to call.
What to expect when you call LEX for heating service in Dallas-Fort Worth.
Call us at (972) 466-1917 or book online through our scheduling portal. We'll gather details about your heating problem, confirm your location, and dispatch the nearest available technician—often within minutes for emergency calls. You'll receive confirmation with estimated arrival time and your technician's name.
Our licensed, uniformed technician arrives in a fully-stocked service vehicle within your scheduled window (10-15 minutes in Plano, 25-30 minutes in Dallas for emergencies). After introducing themselves and confirming the issue, they perform a comprehensive diagnostic inspection using specialized testing equipment to identify the root cause.
Once we've identified the problem, your technician explains what's wrong in plain language—no confusing technical jargon. You'll receive upfront, written pricing for the recommended repair before any work begins. We present all available options, from basic fixes to comprehensive solutions, so you can make an informed decision. No surprises, no hidden fees.
After you approve the quote, our technician completes the repair using high-quality OEM or equivalent parts carried on our trucks. Most heating repairs are finished in a single visit. We work efficiently while maintaining strict quality standards, following all manufacturer specifications and local building codes.
We don't just fix it and leave. Every repair includes thorough testing to verify proper operation—checking ignition sequences, measuring temperature rises, testing safety controls, confirming adequate airflow, and ensuring efficient combustion. We run your heating system through complete cycles to guarantee everything functions correctly.
We treat your home with respect, cleaning our work area and removing all debris. Your technician reviews what was done, provides maintenance recommendations, and answers any questions. You'll receive documentation of the service for your records, along with warranty information. We follow up within a few days to ensure your continued satisfaction.
Same-day service with 10-15 minute response in Plano, 25-30 minutes in Dallas. We know heating emergencies can't wait, especially during Texas cold snaps when temperatures plummet overnight.
You'll know the exact cost before we begin. No hidden fees, no surprise charges—just honest pricing from a company that values your trust more than a quick profit.
Every LEX technician holds proper Texas HVAC licensing (TACLA38788C), NATE certification, and passes thorough background checks. We hire professionals who treat your home like their own.
We repair and maintain every major heating system brand—Trane, Carrier, Lennox, Rheem, Goodman, Bryant, York, American Standard, and more. Our technicians receive ongoing factory training to stay current.
We stand behind every repair with our satisfaction guarantee. If you're not completely happy with our work, we'll make it right—no questions asked. Your comfort and safety are our priorities.
We're not a national chain or franchise. We're your neighbors in Plano, serving DFW families for over 22 years. When you call LEX, you're supporting a local business that genuinely cares about this community.
"Our furnace died at 11 PM on the coldest night of the year with our two young kids in the house. LEX had a technician at our door within 20 minutes. He diagnosed a faulty ignitor, had the part on his truck, and had us warm again in under an hour. The price was fair, and the service was outstanding. We've used LEX for everything since then."— Sarah M., McKinney, TX
"I called three companies about replacing our 18-year-old furnace. Two gave me quotes over the phone without even looking. LEX sent a technician who spent an hour evaluating our home, explained our options clearly, and helped us choose the right-sized system. Installation was professional, and our heating bills dropped by 30%. Worth every penny."— James T., Plano, TX
LEX provides comprehensive heating repair, installation, and maintenance across the entire DFW metroplex.
Based in Plano since 2004, we serve residential and commercial customers throughout Collin County, Dallas County, Denton County, and Tarrant County. Our strategically located headquarters allows us to reach most DFW cities within 30 minutes for emergency heating service. Whether you need furnace repair in Dallas, heater installation in Frisco, or heat pump service in McKinney, LEX is your trusted local heating company.
We proudly serve these DFW communities and surrounding areas:
Don't see your city listed? We likely serve your area! Call (972) 466-1917 to confirm service availability in your location.
Our technicians are trained and certified to repair, maintain, and install all major heating system manufacturers.
Don't see your heating system brand listed? We service all makes and models. Call (972) 466-1917 to confirm.
Complete home comfort solutions from your trusted DFW HVAC company.
Our emergency response times vary by location: 10-15 minutes in Plano (our headquarters), 15-20 minutes in Frisco, McKinney, Allen, and Richardson, and 25-30 minutes in Dallas, Carrollton, and Garland. We maintain 24/7 emergency technicians on call and dispatch the nearest available service vehicle. During severe winter weather, response times may extend slightly due to increased demand, but we prioritize no-heat emergencies, especially those involving vulnerable residents.
Most heating repairs range from $150-$800 depending on the problem. Simple fixes like thermostat batteries, tripped breakers, or filter changes cost $75-$200. Common repairs like ignitor replacement, blower motor service, or flame sensor cleaning run $200-$500. Major repairs such as heat exchanger replacement, gas valve replacement, or control board repairs cost $500-$1,200. Complete furnace replacement starts around $3,500. We always provide upfront pricing before starting any work, so there are no surprises.
Annual heating maintenance before winter is essential for safety, efficiency, and reliability. We recommend scheduling service in October or November before the first cold snap. If you have a heat pump that provides both heating and cooling, consider bi-annual service—once before summer and once before winter. Regular maintenance prevents 95% of heating breakdowns, extends equipment life by 5-10 years, maintains manufacturer warranties, ensures safe operation (especially critical for gas furnaces), and keeps energy bills lower through peak efficiency.
Consider replacement if your furnace is over 15 years old, requires frequent repairs (more than two per year), repair costs exceed 50% of replacement cost, causes high energy bills despite maintenance, or struggles to heat your home adequately. Modern high-efficiency furnaces (95%+ AFUE) can reduce heating costs by 20-40% compared to older 60-80% efficiency models. We'll assess your specific situation honestly and help you make the most cost-effective decision—sometimes repair makes sense, but often replacement offers better long-term value.
Carbon monoxide is odorless and invisible, making it deadly. Warning signs include: CO detector alarming (evacuate immediately), flu-like symptoms (headaches, nausea, dizziness) that improve when you leave home, soot or yellow/brown staining around furnace or vents, yellow pilot light instead of blue flame, excessive condensation on windows during heating, and pets acting strangely or lethargic. If you suspect CO exposure, leave immediately, call 911 from outside, do not re-enter until authorities clear your home, and contact us for emergency furnace inspection once safe to return.
Several issues can cause cold air: thermostat set to "fan on" instead of "auto" (easy fix), pilot light or ignition failure (common in older systems), flame sensor covered in soot (needs cleaning), gas supply issue or closed gas valve, low refrigerant in heat pumps (requires professional repair), or air filter so clogged that safety limits shut down the burners. If your system blows cold air for more than a few minutes after starting, turn it off and call us for diagnosis—continuing to run it wastes energy and may cause further damage.
Proper heating system sizing requires professional load calculation considering square footage, ceiling height, insulation levels, window efficiency, air infiltration, ductwork condition, and local climate. Oversized systems waste energy and short-cycle, while undersized systems run constantly and can't maintain comfort. In DFW, most homes need 30-60 BTU per square foot for heating. We perform Manual J load calculations for every installation to ensure optimal sizing—never guessing based on square footage alone, which many contractors unfortunately still do.
Yes, we offer flexible financing options through approved lenders for both repairs and new system installations. Plans include 0% interest for 12 months with approved credit, extended payment plans up to 60 months, and same-day approval available. Financing allows you to restore home comfort immediately rather than waiting to save up, invest in higher-efficiency equipment that pays for itself through energy savings, and spread costs into manageable monthly payments. Ask your technician about current financing promotions during your service visit.
Homeowners can handle simple tasks: changing air filters monthly, keeping vents unblocked, ensuring outdoor units (heat pumps) stay clear of debris, and testing thermostat operation. However, professional annual maintenance is essential for safety and efficiency. Our technicians inspect heat exchangers for dangerous cracks, test carbon monoxide levels, clean burners and flame sensors, check gas pressure and combustion efficiency, lubricate motors and bearings, test safety controls, and verify proper airflow. Gas heating systems especially require professional inspection—attempting DIY repairs on gas appliances is dangerous and often violates local codes.
Furnaces generate heat by burning fuel (gas, oil) or electric resistance coils, providing very warm air even in extreme cold. Heat pumps transfer existing heat from outdoor air into your home (and reverse for cooling in summer), operating efficiently in mild climates but struggling when temperatures drop below 30-35°F. In DFW, both work well—furnaces cost less to run during our coldest weeks, while heat pumps excel during our mild 40-60°F winter days. Many DFW homes use "dual fuel" systems: heat pump for efficiency most of winter, with gas furnace backup during hard freezes.
A dusty or musty smell when first starting your furnace after months of inactivity is normal—accumulated dust burns off heating elements. This should dissipate within 30 minutes. However, call us immediately if you smell: natural gas (rotten egg odor)—evacuate and call 911, burning plastic or rubber—indicates overheating components or electrical problems, electrical burning—suggests wiring issues, or persistent smoke—never normal and indicates serious problems. When in doubt, turn off your heating system and call us for inspection. It's always better to be safe.
Don't wait until you're freezing. Same-day service from DFW's trusted heating experts since 2004.
Licensed TACLA38788C • 24/7 Emergency Service • 100% Satisfaction Guaranteed
