What the job involves
The ignitor is what lights the burners, and the flame sensor is what tells the control board the flame is actually there. When the ignitor cracks, nothing lights. When the sensor gets coated in residue, the board assumes there is no flame and shuts the gas off within seconds as a safety measure. We pull the burner assembly, test the parts electrically, and either clean the sensor or fit a replacement matched to your furnace. Then we run the system through several full cycles to confirm it holds.
What we check and install
We start at the thermostat and the breaker, because a heating repair call sometimes ends there. From there we read the control board fault codes, check gas pressure at the valve, inspect the burners for rust and debris, and measure the microamp signal coming off the flame sensor. A weak signal points to a dirty or worn sensor. An open reading on the ignitor circuit points to a cracked element. We carry common ignitors and sensors on the truck, so most furnace repair visits of this kind finish the same day.
How we decide it is the right call
Short cycling on ignition is the clearest sign. If the burners light and drop out after three to seven seconds, that is a flame sensing problem nearly every time. If you hear the inducer motor run and never see a glow, the ignitor is the first suspect. We do not swap parts on a hunch. We confirm with meter readings first, because a bad control board or a blocked flue can mimic both symptoms, and replacing the wrong part leaves you cold again next week.
Other furnace repair work
The same on every visit
The quote comes first, in writing
Covering 81 cities across Alabama, Georgia, Kentucky and 3 more.Phones answered by people
Open 7 days, 8:00 AM to 5:00 PM ET.Every major brand, gas and electric
Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.Ignitor & Flame Sensor Repair — quick answers
How long does a hot surface ignitor last?
Several heating seasons is typical, though it varies with how often your furnace cycles. They fail from normal thermal stress. Older homes in the region with undersized ductwork tend to cycle more, which wears ignitors faster.
Can a dirty flame sensor be cleaned instead of replaced?
Often yes. Light residue cleans off and restores a normal signal. If the rod is pitted, corroded or the signal stays weak after cleaning, we replace it rather than leave you with a repeat no-heat call.
Why does my furnace light then shut off after a few seconds?
That pattern almost always means the flame sensor is not confirming the burner flame, so the control board closes the gas valve. It is the safety working correctly. Call us for heater repair and we will test the sensor signal.
How it works
- Step 1
Tell us the symptom
Call or fill in the quote form and describe what you hear, smell or feel. Warm air, short cycling, a breaker that keeps tripping. That gives us a head start on the likely cause.
- Step 2
We diagnose on site
A technician checks the thermostat, airflow, electrical connections, refrigerant performance and the outdoor unit. We work the crawlspace and the attic too, because ductwork and drainage cause more trouble than people expect.
- Step 3
You decide, then we fix it
We explain what failed, what it takes to repair it, and what we would watch next season. No work starts until you say go. Most repairs finish the same visit when parts are on the truck.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Mixed heating is normal to usHeat pumps, propane furnaces and dual-fuel setups all behave differently in cold weather. We know how a heat pump should sound in the thirties and when the backup heat is doing too much of the work.
- We go under the houseRed clay crawlspaces hide crushed ducts, sweating lines and standing water. Comfort problems often start down there, not at the unit, so we look before we start replacing parts you may not need.
- Plain explanationsYou get told what broke and why, in words that make sense. If a repair is a short-term patch on an aging system, we say that out loud so you can plan instead of guessing.
- One crew, six statesWe serve homeowners across Alabama, Georgia, Kentucky, North Carolina, South Carolina and Tennessee. Same approach in every one: show up, diagnose properly, repair what needs repairing, leave the space clean.
- All major brands, gas & electricOne independent crew for Carrier, Trane, Lennox, Goodman, Rheem and more.
- Straight answersNot worth fixing? We say that out loud, and often it saves you the visit fee.
Ignitor & Flame Sensor Repair
Ready to book ignitor & flame sensor repair?
Describe the system and your ZIP. The written quote comes before any work.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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