Flame Sensor Service
Flame Sensor Cleaning and Replacement in Hendersonville
Furnace runs for a few minutes, then shuts off? A sooty flame sensor can cause exactly that pattern, and cleaning it often restores steady heat.
SCHEDULE SERVICE · (615) 759-0528
Licensed and insured style service · Mon-Fri: 7AM - 7PM, Sat: 8AM - 4PM, 24/7 Emergency · Serving Hendersonville and Sumner County, TN
What is going wrong in Hendersonville homes
The flame sensor proves to the control board that a flame is present. When soot coats the rod, the board loses that signal and shuts the furnace down for safety, even though the burners lit fine. The result is a furnace that starts, runs briefly, and stops.
Cleaning helps when the coating will come off. When the rod is pitted or the coating will not clean back, replacement is the honest fix. We show you the sensor condition and explain which path we took and why.
How we fix it
Sensor inspection
We pull the sensor, check for soot, pitting, and loose wiring, and test the flame signal.
Cleaning when it works
We clean the rod with the right method for the part, without scratching it in a way that shortens life.
Replacement when needed
If cleaning will not restore a steady signal, we fit a matching sensor and test the full cycle.
Root cause check
We also check burner and gas issues, since a dirty sensor can be a symptom of poor combustion.
Why Hendersonville homeowners call us first
Flame sensor calls are frustrating because the furnace seems to work, then stops. A clear test and a clean or new sensor usually ends that cycle the same day.
Safety comes first on gas work. If you smell gas, leave the house first, then call your gas utility or 911 from outside. Do not flip switches or light anything. Once the area is declared safe, call us at (615) 759-0528 and we will inspect the furnace before it runs again.
Repair or look at replacement
| Situation | Our guidance | Why |
|---|---|---|
| Runs minutes, then stops | Clean or replace sensor | This pattern is a classic flame sensor symptom. |
| Sensor cleans, fault returns fast | Check burners and gas | Poor combustion can recoat a sensor quickly. |
| Sensor and ignitor both worn | Replace both if failed | Age can wear both parts at the same time. |
Hendersonville angle: Sumner County, ZIP 37075, and Old Hickory Lake
Hendersonville homes with older gas furnaces, especially ranch homes with original burners, see flame sensor soot more often. A yearly tune-up in fall catches that buildup before the first cold snap in Sumner County.
Hendersonville sits on Old Hickory Lake, about 18 miles northeast of downtown Nashville, in Sumner County. Homes here range from older ranch homes to newer lake area subdivisions, and that mix means furnace age, duct layout, and venting can vary a lot from one street to the next. We check age, airflow, and safety controls on every visit, and we explain what we find in plain words before any work starts.
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Frequently Asked Questions
Can a flame sensor be cleaned instead of replaced?
Often yes, when soot is the only problem and the rod is not pitted. We clean when it works and replace when it does not.
Why does my furnace shut off after a few minutes?
A sooty flame sensor can lose the flame signal and shut the furnace down for safety. Testing confirms the cause.
How long does flame sensor service take?
Usually a short visit, plus a full heat cycle test to confirm steady flame.
Will cleaning last all winter?
Often yes, if combustion is clean. If soot returns fast, we check burners and gas pressure for the root cause.
Is a flame sensor fault dangerous?
The shutdown itself is a safety step. Do not bypass it. Call us and we will test the sensor and the furnace.
Helpful Sources
No Heat? Do Not Wait It Out
Licensed and insured style service. Mon-Fri: 7AM - 7PM, Sat: 8AM - 4PM, 24/7 Emergency. Serving Hendersonville and Sumner County, TN.