From the hallway, a furnace that will not heat looks the same no matter what broke. Inside the cabinet, though, the sequence is strict: inducer on, pressure switch closed, igniter glowing, gas valve open, burners lit, flame proven, and finally the blower moving heat through the ducts. Most of the diagnosis comes down to finding the broken link. In Kenner homes, it tends to be the same handful of culprits: a flame sensor coated in oxide, a hot surface igniter cracked by thermal cycling, a pressure switch held open by a tired inducer or a plugged condensate trap, or a control board with a burned relay.
Kenner 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: heat exchanger inspection, leak-testing of gas connections, and flue draft verification, 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.
We work on natural gas, propane, and electric furnaces from every major brand, both conventional 80 percent units and condensing high-efficiency models with their traps, drains, and dual pressure switches. The truck stock covers the parts that actually fail: igniters, flame sensors, pressure switches, capacitors, inducer assemblies, and blower motors, so most repairs finish in one trip. For furnace repair anywhere in Kenner, call (504) 531-6160 and we will get the burners lit today.
Cooling trouble instead? See AC Repair in Kenner.
How Much Does Furnace Repair Cost in Kenner?
Most furnace repairs in Kenner cost between $150 and $600. Ignition and sensor problems are usually the least expensive, while blower motors, control boards, and heat exchangers cost more. You'll get a written, upfront price from Kenner HVAC after we diagnose the problem.
| 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 | Burners run but little or no air comes out of the vents |
| Control boardErratic behavior, error codes, or no response at all | $300–$700 | Erratic behavior, error codes, or no response at all |
| Gas valve replacementIgniter glows but gas never flows to the burners | $250–$700 | Igniter glows but gas never flows to the burners |
These are common price ranges, not quotes. We confirm the exact price after diagnosing your system.
What Moves the Cost Up or Down
- The age and efficiency of the furnace, since high-efficiency models use more specialized parts
- A cracked heat exchanger, which is a safety issue and usually points to replacement
- Same-day or after-hours service versus a planned visit
- How easy the furnace is to reach
If your furnace is past 15 to 20 years old or the repair is a major one, we'll give you repair and replacement prices side by side. No heat right now? Call (504) 531-6160.
When to Call for Furnace Repair in Kenner
The sooner you notice these red flags, the easier and cheaper the problem is to resolve. Keep an eye out for the following clues that it's time to bring in an expert:
- The blower runs constantly but the air never warms
- Grinding or high-pitched squeals from the blower
- Burners light, run a few seconds, then shut down repeatedly
- Rust streaks, soot, or water around the cabinet or flue
- Loud booms at startup caused by delayed ignition
- Frequent on-off cycling that never reaches the thermostat setting
- The igniter glows and clicks, yet no flame ever appears
- A flame that burns soft and yellow rather than steady blue
Early Action Saves Money
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. At the first hint of a problem, reach out to Kenner HVAC at (504) 531-6160 for a fast inspection.
Your Furnace Repair Questions Answered
Why Hire a Professional for Furnace Repair?
A furnace combines gas, flame, high voltage, and a flue in one cabinet, and the failure that matters most is the one you cannot see from outside: a compromised heat exchanger passing combustion gases into the air your blower pushes through the house. Delayed ignition that booms at light-off stresses that exchanger further every morning it goes unfixed. Meanwhile the diagnostic traps stack up: a furnace that trips its high limit may have a bad switch, or it may be protecting itself from a clogged filter or a dying blower, and replacing the switch in the second case just removes a safety while leaving the fault.
Our techs 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. The result 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.
How Our Furnace Repair Works
Our systematic workflow delivers thorough, lasting results on every job. Here's exactly how the furnace repair process unfolds:
Sequence 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.
Combustion Safety Check
Every repair includes a safety check: heat exchanger inspection, instrument leak testing on the gas side, and flue draft verification, because a furnace that runs is not the same as a furnace that runs safely.
Same-Visit Repair
We fix the confirmed fault, and since igniters, flame sensors, pressure switches, capacitors, and motors are on the truck, most furnaces are heating again the same visit.
Complete Verification
The last step is a full-cycle test: temperature rise matched to the data plate, smooth ignition with no booming, and every limit switch and safety control confirmed working.
Maintenance Tips for Furnace Repair
Taking preventive measures can help you avoid costly heating and cooling problems down the road. Start with these practical measures our team relies on:
- Test your CO detectors monthly and make sure each floor has one
- On high-efficiency models, keep the condensate trap and drain line clear and draining
- Pay attention when the burners light, since a boom instead of a soft whoosh calls for service
- Give the furnace room to breathe, since a crowded utility space starves the burners of air
- Have the furnace checked every autumn, while a weak igniter or fouled sensor is still an easy fix
- Store laundry supplies, especially chlorine products, well away from the furnace closet
- Change the filter monthly during heating season; it is the cheapest furnace part you will ever buy
Should You DIY or Call a Pro?
While some minor tasks like changing filters or checking a thermostat can be handled by homeowners, most HVAC work involves refrigerant, gas combustion, and high-voltage electricity, jobs that call for professional expertise. Consider the following comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Heat Exchanger | Cracks invisible from the outside | Checked every time we open the unit |
| Ignition Faults | Guesswork based on blink codes | Igniter, sensor, and valve each metered |
| Gas Connections | A loose union goes unnoticed | Instrument leak test on each visit |
| High-Limit Trips | Limit replaced, cause left behind | Filter, blower, and ducts checked for the cause |
| Blower Setup | Blower speed left wherever it was | Rise measured and blower adjusted |
| Final Check | It lit once, call it fixed | Clean, safe operation verified over full cycles |
Schedule Your Furnace Repair Service
Get your comfort back before a small fault becomes a full breakdown. Kenner HVAC is ready to respond fast.
Call (504) 531-6160 NowFurnace Repair Across the Kenner Area
We serve Kenner and its neighboring communities for furnace repair, from quick same-day repairs to planned installs.