Furnace Problems Guide
Common Furnace Problems in Hendersonville, TN
Pick the problem that sounds like yours. Each one below gives a plain-words cause, what to check safely, and when to call.
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Clicking but no flame often points to an ignitor. Running a few minutes then shutting off often points to a flame sensor. Blowing cold air can point to a failed heating stage, a blower fault, or a control fault. Short cycling can point to airflow, thermostat settings, or a safety control tripping.
Smells matter. A burning dust smell at first use in fall can be normal for a short time. A gas smell, a strong burning electrical smell, or a rotten egg smell is not normal. Leave the house for a gas smell, then call your gas utility or 911 from outside.
Noises are clues. Banging, rattling, or hissing at startup can point to delayed ignition, loose parts, or vent issues. Weak air from vents can point to a blower, filter, or duct issue. Ice or heavy condensation on a furnace is less common than on cooling equipment, but water leaking from equipment should always be checked promptly.
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Frequently Asked Questions
My furnace clicks but never lights. What is it?
Often a cracked or worn ignitor. Testing confirms it before we replace anything.
Why does my furnace run then shut off?
A sooty flame sensor can lose the flame signal and shut the furnace down for safety.
Why is my furnace blowing cold air?
A failed heating stage, blower fault, or control fault can cause cold air even when the blower runs.
What smells should I worry about?
Gas smells and strong burning electrical smells need prompt attention. For gas, leave the house first, then call your utility or 911.
When should I call instead of waiting?
No heat in cold weather, gas or burning smells, repeated safety trips, and water leaks are all reasons to call promptly.
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.