Heater & Furnace Repair in Keller, TX
Texas Discount Air repairs furnaces and heaters in Keller homes. We’re based in North Fort Worth, right next door, and every visit starts with a $29 service call that includes the trip, the diagnosis, and small fixes.
FURNACE NOISES
What That Furnace Noise Means
| What you notice | What it often means | What to do |
|---|---|---|
| Clicking over and over, but no flame | The furnace keeps trying to light but can’t. The igniter may be worn out, or gas isn’t reaching the burners. | Call for repair |
| Burner lights, then shuts off in seconds | Often a dirty flame sensor. The furnace can’t confirm the flame is burning, so it shuts the gas off for safety. | Call for repair; usually a quick fix |
| Loud bang when the heat starts | Gas is building up for a moment before it lights (delayed ignition), often because burners are dirty or the igniter is weak. Each bang stresses the furnace. | Turn the furnace off and call us |
| Squealing or grinding | Usually the blower motor. Worn bearings make metal-on-metal noise, and the motor can eventually seize. | Call before it gets worse |
| Rattling | A loose panel, screw, or part vibrating as the furnace runs. | Check that the front panel is closed tightly; call if it continues |
| Fan runs, but the air is cold | The burners aren’t lighting, or the furnace overheated and a safety switch shut the burners off while the fan keeps running to cool it down. | Check the thermostat and filter, then call |
QUICK CHECKS
Try These First
- Thermostat set to Heat, a few degrees above room temperature. The furnace only runs when the thermostat asks for heat.
- Fresh thermostat batteries. Many thermostats can’t signal the furnace when their batteries are dead.
- Furnace breaker and furnace switch on. Gas furnaces still need electricity for the fan, igniter, and controls.
- A clean filter. A clogged filter can make the furnace overheat and shut itself off.
- Furnace front panel closed tightly. A safety switch keeps the furnace off when the panel is loose.
Still no heat? Read more about Keller furnace problems or call or text (817) 874-5513.
GOOD TO KNOW
Heating Season Tips
That First-Day Smell
A dusty smell for the first few minutes of the season is normal. Dust settles on the furnace’s burners and metal parts over the summer and burns off the first time the heat runs. If a strong burning smell lasts more than an hour, or smells like plastic or wiring, turn the furnace off and call us.
Keep Vents Open
Closing vents in rooms you don’t use seems like it should save money, but it usually doesn’t. Your system is designed to push a certain amount of air through all the vents. Close some, and the pressure inside the ducts goes up: the blower has to work harder, less air flows across the furnace so it can overheat, and more heated air gets forced out through small leaks in the ductwork. In many North Texas homes those ducts run through the attic, so that heat is lost outside the living space. Meanwhile, the closed-off room still loses heat through its walls and windows, so the furnace doesn’t actually have less work to do.
Change Your Filter
Check it monthly and change it every 1 to 3 months for standard 1-inch filters, or more often with pets, allergies, or construction dust. Thicker 4- to 5-inch filters usually last longer; follow the label. A clean filter keeps air moving freely, so the furnace heats efficiently and doesn’t overheat.
Fall Tune-Up
A tune-up before the first cold night catches problems while they’re small, like a dirty flame sensor or a weak part, instead of on the coldest night of the year when everyone is calling. It also includes safety checks on the furnace. See our tune-up packages.
HOW PRICING WORKS
Simple, Upfront Pricing
$29 Service Call
A technician comes to your home and diagnoses the problem. Small fixes, like a loose wire or a filter change, are included.
Flat-Rate Quote
For larger repairs, you get the exact price before any work starts. No surprises and no overtime charges.
You Decide
Approve the repair and the $29 service call is waived. Financing is available for new equipment and repairs over $500, with approved credit.
SAFETY FIRST
When It’s an Emergency
According to Atmos Energy, if you smell gas, leave the house right away. Once you’re safely away, call 911 and your gas company’s emergency line. For most homes with natural gas in our area, that’s Atmos Energy at 866-322-8667. Don’t flip light switches, use your phone inside, or try to relight the furnace — a tiny spark from a switch or electronics can ignite gas that has built up in the air.
If your carbon monoxide alarm goes off, get everyone outside and call 911. Carbon monoxide has no color or smell, so the alarm is the only warning you’ll get. A gas furnace can release it if the fuel isn’t burning cleanly, the exhaust is blocked, or the part that keeps exhaust separate from your home’s air (the heat exchanger) is cracked.
If you have gas heat and no carbon monoxide alarm, install one near the bedrooms, so it can wake you up at night.
WHO WE SERVE
Homes Only
We repair heating systems in homes only — not businesses, apartment complexes, or vehicles. If you rent, please have your landlord or property manager contact us. They own the system, so they’re the ones who approve and pay for repairs to it.
REVIEWS
What Our Customers Say
★★★★★
“
We have a 9 month old baby and our AC went out 12pm Monday August 17th. Texas Discount Air had a tech out in 30 minutes and determined our 1980’s AC system finally needed to be replaced. We were able to get the whole system ripped and replaced and running by 3pm Today, Tuesday August 18.
Brand new 5 ton 14.5 seer system with ecobee wifi thermostat within 24 hours of outage. 5/5 stars for price, quality and timeliness. Excellent privately owned local company.
Thank you guys.
Jacob W. · August 2026 · Google
★★★★★
“
Todd did an excellent job repairing our ac after the thunderstorm damage. The quote was reasonable. No extra costs added on last minute. We finally found a great technician we can trust.
Vera W. · May 2022 · Thumbtack
★★★★★
“
I just had a great experience with Texas Discount Air! They came to my home and quickly fixed my furnace fuse and heating and cooling system. The technician was super friendly, professional, and honest, and the price was great. Now my AC and heater work perfectly. Fast, reliable service. I’m giving Texas Discount Air ⭐⭐⭐⭐⭐
Vaibhav S. · 2025 · Google
★★★★★
“
Very quick and professional service. Todd was at my house working on my AC within the hour of posting my project. He was very friendly and provided excellent service. I would definitely recommend him and use him for future AC issues.
Claudio V. · December 2016 · Thumbtack
★★★★★
“
I randomly looked up Texas Discount Air and filled up a form online for a quick diagnosis ( they had unbeatable rates for a service call $29 ).I received a SMS to confirm and schedule. Todd arrived on time, diagnosed and fixed the problem in a flash and even did not charge me coz it was a simple fix. WOW!!! Who does that anymore ?
Tony P. · 2024 · Google
★★★★★
“
ACs been running poorly, $500 electric bill was the final straw. Called Todd assuming freon was low. His equipment showed it was still full, so he did an inspection on the unit to find back coil covered in debris (forgot to clean!). At no charge, at the absolute minimum he is an honest man, which is everything today. Will use in future. Thank you, sir.
Joseph B. · 2023 · Google
QUESTIONS
Keller Heater Repair FAQ
Need Heating or AC Repair?
$29 service call, free with any repair.