Most homes in the Birmingham area rely on a gas furnace to stay warm through winter cold snaps, and a furnace that will not start, short cycles, or blows cold air needs attention quickly. One Source Heating, Cooling, Plumbing & Electrical provides furnace repair and replacement in Birmingham, AL. Our NATE-certified technicians find the actual cause of the problem, check the system for safety, and explain your options and price before any work begins.
One Source has served Birmingham homeowners since 1996. We never use subcontractors, our trucks carry common furnace parts so most repairs can be completed on the first visit, and repair service is available 24/7.
Signs Your Furnace Needs Repair
- The furnace will not turn on, or the blower runs but there is no heat
- Cold or lukewarm air coming from the vents
- The furnace turns on and off frequently
- Uneven heat from room to room
- Loud banging, rattling, squealing, or scraping noises
- A burning or electrical smell that does not go away after the first startup of the season
- A yellow or flickering burner flame instead of a steady blue flame
- The thermostat calls for heat but nothing happens
- Rising gas bills without a change in use
- Carbon monoxide alarms sounding
Furnace Safety First
If you smell natural gas, do not operate switches or appliances. Leave the home immediately and call your gas utility or 911 from a safe location. If a carbon monoxide alarm sounds, get everyone outside and call for help. Once the home is safe, our technicians can inspect and repair the furnace. Every home with gas appliances should have working carbon monoxide detectors.
Common Furnace Problems We Repair in Birmingham
Ignitor and Flame Sensor Failures
Modern furnaces use a hot surface ignitor to light the burners and a flame sensor to confirm the flame is present. A cracked ignitor or a dirty flame sensor is one of the most common reasons a furnace tries to start and then shuts off.
Clogged Air Filters and Overheating
A dirty filter restricts airflow, causing the furnace to overheat and shut down on its high-limit switch. Replacing the filter regularly prevents many service calls.
Inducer Motor and Pressure Switch Problems
The inducer motor clears combustion gases before the burners light, and the pressure switch confirms the venting is working. Failures, blocked vents, or condensate problems can prevent the furnace from starting.
Blower Motor and Capacitor Failures
The blower moves warm air through your ductwork. A failing motor or capacitor can cause weak airflow, noise, or no heat at the vents.
Thermostat and Control Board Issues
Wiring problems, thermostat failures, and control board faults can look like a major furnace failure. Proper diagnosis keeps you from paying for parts you do not need.
Cracked Heat Exchangers
The heat exchanger separates combustion gases from the air you breathe. Cracks can develop as a furnace ages and may allow carbon monoxide to escape. A cracked heat exchanger is a serious safety concern and often means replacement is the safer choice.
What to Check Before You Call
- Thermostat: Make sure it is set to heat, the set temperature is above room temperature, and the batteries are good.
- Air filter: Replace a dirty filter.
- Power: Check the breaker and the service switch near the furnace, which can look like a light switch.
- Furnace door: The blower compartment door must be fully closed for the safety switch to allow operation.
- Vents: Make sure supply and return vents are open and not blocked by furniture.
Do not attempt repairs on the gas valve, burners, or electrical controls. Those require a trained technician.
Our Furnace Repair Process
1. We Review the Symptoms
We start with what you are experiencing and any error codes shown on the furnace control board.
2. We Inspect and Diagnose
We check ignition, flame sensing, venting, airflow, electrical components, and controls, and we inspect the system for safety concerns.
3. We Explain Your Options and Price
You get a clear explanation of what failed and the repair cost before any work begins.
4. We Complete the Repair
With common parts on our trucks, most repairs are completed during the first visit.
5. We Test the System
We run the furnace through a full heating cycle to confirm safe, reliable operation.
Repair or Replace Your Furnace?
Repair is usually the right choice when the furnace is in good overall condition and the failure involves a single component. Replacement may be worth considering when:
- The furnace is roughly 15 to 20 years old or older
- The heat exchanger is cracked
- Repairs are becoming frequent or expensive
- Heating bills keep rising
- The home never feels evenly warm
We will give you an honest recommendation and help you compare the cost of a repair with the long-term value of a new system. Financing is available through our financing options.
Furnace Replacement and Installation in Birmingham
Furnace technology has improved significantly. An older furnace may convert as little as 60 to 70 percent of its fuel into heat, while today’s high-efficiency models reach 90 to 98 percent AFUE. Upgrading can lower annual heating costs and improve comfort. When you replace a furnace, features to consider include:
Condensing Furnaces
A condensing furnace uses a second heat exchanger to capture additional heat from combustion gases, reaching efficiencies up to 98 percent AFUE.
Two-Stage and Modulating Gas Valves
Instead of running only at full output, two-stage and modulating furnaces adjust their heat output to match demand, which means steadier temperatures, quieter operation, and less fuel use.
Variable-Speed Blowers
Variable-speed blower motors move air more gently and efficiently, improving comfort, filtration, and humidity control year-round.
Proper Sizing
A furnace that is too large short cycles and wastes energy, while one that is too small struggles on cold nights. We size replacement systems based on your home’s actual heating needs. Learn more about our heating installation service.
Prevent Breakdowns With Annual Maintenance
Annual heating maintenance before winter allows our technicians to clean and test the ignition system, burners, flame sensor, and safety controls, check venting, and catch small problems before they become no-heat calls. Ask about our HVAC maintenance plans.
Gas Furnaces, Heat Pumps, and Dual-Fuel Systems
We repair and install gas furnaces from all major manufacturers. Many Birmingham homes also use heat pumps, or a dual-fuel system that pairs a heat pump with a gas furnace for backup on the coldest days. For other heating issues, see our heating repair service.
Emergency Furnace Repair
When the heat goes out on a freezing night, One Source provides 24/7 repair service. Learn more about our 24/7 emergency HVAC repair.
Furnace Service Throughout the Birmingham Area
We provide furnace repair and replacement in Birmingham and surrounding communities, including Homewood, Hoover, Trussville, Gardendale, Fultondale, Center Point, Bessemer, Mountain Brook, Vestavia Hills, Pelham, and Alabaster. See all of our Birmingham heating and cooling services.
Why Birmingham Homeowners Choose One Source
- Serving the Birmingham area since 1996
- NATE- and EPA-certified technicians
- We never hire subcontractors
- Fully stocked trucks so most repairs are completed the same day
- 24/7 repair service
- Alabama Power Superior Solutions Dealer
- Work backed by our guarantee and a 100% satisfaction commitment
Schedule Furnace Repair in Birmingham, AL
If your furnace is not heating, short cycling, or making unusual noises, contact One Source to schedule furnace repair or a replacement estimate in Birmingham.
Frequently Asked Questions About Furnace Repair in Birmingham
Why is my furnace blowing cold air?
Common causes include a thermostat set to fan instead of auto, a dirty flame sensor, a failed ignitor, a clogged filter causing the furnace to overheat and shut off, or a venting problem. A technician can test the system to find the exact cause.
Why does my furnace keep turning on and off?
Short cycling is often caused by a dirty filter, an overheating furnace, a dirty flame sensor, a thermostat problem, or a system that is too large for the home.
How long does a furnace last?
Many gas furnaces last roughly 15 to 20 years with regular maintenance. Age, maintenance history, and repair frequency all affect whether repair or replacement makes more sense.
Is a cracked heat exchanger dangerous?
Yes. A cracked heat exchanger can allow carbon monoxide to escape into the home. If one is found, the furnace should be shut down until it is repaired or replaced.
What should I do if I smell gas?
Leave the home immediately without operating switches or appliances, and call your gas utility or 911 from a safe location.
Do you offer 24/7 furnace repair in Birmingham?
Yes. One Source provides 24/7 repair service for urgent heating problems.