Most DFW homeowners spend so much time worrying about their AC that they forget about their furnace — until a cold snap hits in January and the heat doesn’t come on. At Expedition HVAC, based right here in Garland, we see a surge of furnace repair calls every time North Texas gets a hard freeze.
Don’t get caught off guard. Here are the warning signs that your furnace needs attention before winter arrives — and what to do about it.
Warning Signs Your Furnace Needs Repair
1. The Furnace Isn’t Producing Heat
This is the obvious one — you turn on the heat and nothing warm comes out (or nothing comes out at all). Common causes include a faulty ignitor, failed thermocouple, gas supply issue, or a tripped high-limit switch.
2. Strange Noises When the Furnace Runs
A properly functioning furnace should start and run relatively quietly. Watch out for:
- Banging or popping — often caused by dirty burners or small explosions of delayed ignition
- Screeching or squealing — usually a worn blower belt or failing motor bearings
- Rattling — could indicate loose panels, a cracked heat exchanger, or debris in the ductwork
3. Yellow or Orange Pilot Light
Your furnace pilot light should burn blue. A yellow or orange flame indicates incomplete combustion, which can mean your furnace is producing carbon monoxide — a colorless, odorless, potentially deadly gas. If you see a non-blue flame, turn off your furnace and call us immediately.
4. Frequent Cycling On and Off
If your furnace turns on, runs briefly, then shuts off repeatedly (called “short cycling”), it may be overheating. This is often caused by a dirty air filter or a failing high-limit switch.
5. Unusually High Gas Bills
If your heating bills have spiked compared to previous winters without a significant change in usage or temperatures, your furnace may be losing efficiency due to dirty components, a cracked heat exchanger, or improperly calibrated controls.
6. The System Is Over 15 Years Old
The average lifespan of a gas furnace in Texas is 15–20 years. If your system is approaching or past that age, it’s smart to have it inspected and start planning for replacement — before a mid-winter failure forces an emergency purchase.
Garland-Specific Heating Challenges
Garland, TX sits in an area that experiences what meteorologists call a “freeze-thaw cycle” several times each winter. Unlike northern cities where infrastructure is built for sustained freezing temperatures, North Texas homes often see dramatic temperature swings — from 65°F on a Tuesday to 20°F on a Thursday. This places unique strain on HVAC systems that may sit idle for months before being called on suddenly.
Schedule a Fall Furnace Tune-Up
The best time to find a furnace problem is before you need it. Our fall heating tune-up includes:
- Inspection of the heat exchanger for cracks
- Cleaning of the burner assembly
- Testing of ignitor and flame sensor
- Checking flue and venting for obstructions
- Testing safety controls and limit switches
- Lubricating blower motor bearings
- Measuring gas pressure and combustion efficiency
As your local Garland HVAC company, we’re ready to help. Call 469-905-4822 or schedule your fall tune-up online. We also serve Mesquite, Richardson, Rowlett, and all of DFW.
