Every time your thermostat calls for heat, the furnace runs a fixed checklist. The inducer motor starts and proves draft by closing a pressure switch, the hot surface igniter heats up, the gas valve opens, the burners light, and the flame sensor confirms there is fire. Only after all of that does the blower begin sending warm air into the house. Finding the step that fails is most of the job. Around New Braunfels, TX, the usual failure points are a flame sensor fouled with oxide, an igniter cracked by years of heating and cooling, a pressure switch that stays open because of a weak inducer or a clogged condensate trap on a high-efficiency unit, and control boards with burned relays. Each one halts the startup, and from the hallway they all look alike.
New Braunfels HVAC repairs furnaces by testing the sequence, not guessing at it. Our experienced technicians watch the startup step by step and measure at each stage: igniter resistance, flame signal in microamps, pressure switch operation against actual inducer draft, gas valve voltage, and blower and capacitor health. Every visit includes the safety fundamentals on a fuel-burning appliance: the heat exchanger inspected, connections leak-tested, and draft confirmed, because the difference between a furnace problem and a furnace hazard is not visible from the thermostat. We measure temperature rise against the data plate before we leave so the fire and the airflow are matched the way the manufacturer intended.
Conventional or condensing, gas, propane, or electric, we work on them all, across every major brand, including the traps, drains, and dual pressure switches that come with high-efficiency models. The parts most likely to fail are already stocked on the truck: igniters, flame sensors, pressure switches, capacitors, inducer assemblies, and blower motors. That is why most repairs are finished in a single trip. If your furnace is down anywhere in New Braunfels, call (830) 202-5230 and help will be headed your way today.
Cooling trouble instead? See AC Repair in New Braunfels.
How Much Does Furnace Repair Cost in New Braunfels?
Most furnace repairs in New Braunfels cost between $150 and $600. Cleaning a flame sensor is a small job; replacing a blower motor or control board is a bigger one. New Braunfels HVAC tests the system, finds the actual fault, and quotes the repair before any work begins.
| Repair | Typical cost | What it usually means |
|---|---|---|
| Flame sensor cleaning or replacementFurnace lights, then shuts off within seconds | $80–$250 | Burners light but cut out almost immediately |
| Hot surface igniter replacementNo ignition; one of the most common winter failures | $150–$400 | Furnace clicks and tries to start but never lights |
| Draft inducer motorStartup fan fails, furnace won't fire | $400–$1,000 | Loud humming or grinding at startup, then lockout |
| Blower motorBurners run but little or no air comes out of the vents | $400–$1,500 | No airflow, or the blower runs nonstop |
| Control boardErratic behavior, error codes, or no response at all | $300–$700 | Erratic behavior, error codes, or no response at all |
| Gas valve replacementValve fails to open, so the furnace never lights | $250–$700 | Igniter glows but gas never flows to the burners |
Typical ranges for common repairs. Your exact price is quoted after diagnosis.
What Moves the Cost Up or Down
- Furnace age and type, because 90%+ efficiency models have more specialized parts
- Whether a cracked heat exchanger is found, which usually means replacement rather than repair
- Timing, such as a no-heat call on a cold night versus a scheduled repair
- How easy the furnace is to reach
For older furnaces facing a big repair, we'll show you what replacement would cost too, so you can compare. Call (830) 202-5230 to get your price.
Signs You Need Furnace Repair in New Braunfels
Catching these issues early helps you avoid costly problems and protect your property. Keep an eye out for the following clues that it's time to bring in an expert:
- Frequent on-off cycling that never reaches the thermostat setting
- Clicking and a glowing igniter with no burner flame
- A bang or boom when the burners ignite late
- Squeals, scrapes, or grinding noises behind the blower door
- Yellow, wavering burner flames where they should be sharp blue
- Air moving through the vents that never gets warm
- Repeated shutdowns just seconds after the burners light
- Water, rust stains, or black soot around the flue or cabinet
Early Action Saves Money
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. At the first hint of a problem, reach out to New Braunfels HVAC at (830) 202-5230 for a fast inspection.
Furnace Repair Issues? We Can Help.
Call New Braunfels HVAC for fast, reliable service.
Call (830) 202-5230 TodayFurnace Repair FAQ
Why Professional Furnace Repair Matters
The failure that matters most in a furnace is usually hidden. A cracked or corroded heat exchanger can let combustion gases into the airstream, and nothing about it is visible from the outside of the cabinet. Delayed ignition makes things worse, because each boom at light-off puts more stress on that metal. Add high voltage, a gas valve, and a flue to the same box, and there is little room for guesswork. Diagnosis is full of traps too. A high limit that keeps tripping could be a bad switch, or it could be doing exactly its job because a filter is clogged or the blower is dying, and replacing a good switch only hides the real fault.
Our experienced technicians look at every symptom in the context of the whole furnace. We measure flame signal instead of assuming it, which keeps us from replacing a healthy sensor while a cracked igniter or weak gas valve goes unnoticed. Draft is confirmed at the pressure switch and at the flue. Temperature rise is checked against the data plate, so airflow issues are caught before they cut years off the heat exchanger. The gas side is leak-tested with instruments, never with a quick sniff. What you get is a furnace proven safe over a full cycle, plus an honest opinion if the unit is getting close to the point where replacing it beats repairing it again.
What to Expect From Our Furnace Repair
We work through a clear, repeatable process so nothing gets overlooked on your property. Here's a look at each step our New Braunfels HVAC team takes:
Step-by-Step Diagnosis
We watch the furnace's startup sequence and measure at every stage: inducer draft, pressure switch, igniter resistance, flame signal, and gas valve operation, to find exactly where it breaks.
Safety Verification
The heat exchanger is inspected, gas connections are leak-tested, and flue draft verified on every visit. A furnace repair that is not proven safe is not finished.
Expert Repair
Igniters, flame sensors, pressure switches, capacitors, and motors ride on the truck, so most furnaces are lit and heating again before we pack up.
Final Cycle Testing
We run complete cycles, measure temperature rise against the data plate, confirm clean ignition without booming, and verify every limit and safety control before we leave.
Maintenance Tips for Furnace Repair
Smart maintenance is almost always cheaper and easier than an early replacement. Follow these tips from our experienced technicians:
- Schedule service each fall to catch worn igniters and dirty sensors before cold weather arrives
- If you have a high-efficiency furnace, check that the condensate drain is flowing freely
- Replace the filter every month while the furnace is working hard, since it costs less than any other part
- Store laundry supplies, especially chlorine products, well away from the furnace closet
- Give the furnace room to breathe, since a crowded utility space starves the burners of air
- Test your CO detectors monthly and make sure each floor has one
- Notice how the furnace sounds at startup, because a quiet light-off is healthy and a boom is not
Should You DIY or Call a Pro?
Some simple checks are suitable for DIY, but most heating and cooling repairs benefit from professional tools, training, and experience. Consider the following comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Heat Exchanger | Damage hidden inside the cabinet | Inspected on every repair visit |
| Ignition Problems | Parts swapped against a code list | Each ignition component tested |
| Gas Safety | Connections judged by smell | Instrument leak test on each visit |
| Limit Trips | A safety device jumpered out | Root cause of overheating corrected |
| Airflow Match | Airflow assumed, not measured | Blower tuned to the rated rise |
| Final Check | One good start and done | Complete cycles tested before we leave |
Get Furnace Repair Help Today
The sooner you call, the sooner your comfort is back. Reach New Braunfels HVAC for fast service.
Get Help: (830) 202-5230Areas We Serve for Furnace Repair
Our technicians handle furnace repair throughout New Braunfels and the surrounding communities, with the same upfront pricing everywhere we work.