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Heating & Furnace Repair in Columbia, TN
For heating repair in Columbia, TN, the call usually comes on a cold night in Maury County, when the heat has just gone out. The cause is often small: a worn igniter, a dirty flame sensor, a failed inducer motor, or a heat pump that cannot keep up. We work on gas furnaces, electric furnaces, and air handlers, find the failed part, and price the repair in writing before we swap anything.
5-star ratedLicensed & insured in Tennessee25 years in businessColumbia, TN · Price in writing before work starts
No heat? Check these three things first
- Thermostat: set to Heat, temperature set above the room reading, and fresh batteries if it uses them. A blank screen is often just batteries or a tripped float switch.
- Filter: a filter clogged solid can shut a furnace down on high limit. If it is grey and matted, change it and try again.
- Breaker and switch: check the furnace breaker and the service switch near the unit. If the breaker trips a second time, leave it off and call.
If you smell gas, leave the house and call the gas company or 911 first. If a carbon monoxide alarm sounds, get out and call 911. Those two come before any repair call.
How a furnace lights — the seven-step sequence we troubleshoot
A gas furnace lights in a strict order, and every step is a safety check. When heat fails, we find which step stopped — that is the whole diagnostic method, and it is why “it clicks, then quits” tells a tech so much.
Thermostat calls for heat
The control board gets the call and starts the sequence. No call, no sequence — which is why we check the thermostat and its batteries first.
Inducer motor starts
A small fan clears the vent and pulls combustion air in. If the inducer will not run, nothing after it is allowed to happen.
Pressure switch proves the vent is clear
The furnace checks that exhaust can actually leave the house. A blocked vent or a weak inducer fails here — on purpose.
Igniter glows hot
The igniter heats up. A cracked or worn igniter is the most common no-heat part we replace in Maury County winters.
Gas valve opens, burners light
Gas flows and the burners catch. This is the step a delayed-ignition bang belongs to — gas lighting a moment late.
Flame sensor proves flame
A small rod confirms fire is really there. A dirty sensor cannot prove it, so the furnace shuts the gas off and tries again — the classic starts-then-quits pattern.
Blower sends warm air out
Once the heat exchanger is warm, the blower pushes air through the ducts. Cold air the whole time means the sequence died at step 4, 5, or 6 while the blower kept a promise the burners did not.
Tell us where it stops. “It clicks and glows, then quits” and “nothing happens at all” are two different repair trucks’ worth of parts. Thirty seconds of watching one start-up attempt — from outside the cabinet, hands off — can save a second visit.
Heating problems we fix here
Furnace starts, then shuts off
Short-cycling usually traces to a dirty flame sensor, a clogged filter overheating the furnace, or a failing pressure switch. The furnace is protecting itself; the fix is finding which signal it is reacting to.
Loud bang when the furnace starts
A single bang at start-up can be delayed ignition — gas builds up a moment too long before it lights — or duct metal expanding. Delayed ignition is a “get it checked” problem, not a wait-and-see one. Tell us if the bang is new or getting louder.
Blower runs, air is cold
On a furnace, that points at the ignition sequence failing while the blower runs. On a heat pump, see our heat pump page — the causes are different.
Heat works upstairs, not down (or the reverse)
Often duct or airflow, not the furnace. Leaking or crushed runs in the crawl space steal heat before it reaches the room. We check the runs, not just the unit.
No heat, five different ways — tell them apart before you call
| What the system does | What it usually points to |
|---|---|
| Nothing happens at all — no click, no fan, no glow | Power, thermostat, or control: check the thermostat setting and batteries, and the breaker once. If power is there and nothing responds, that detail is the diagnosis start |
| Starts, heats a few minutes, then shuts off and repeats | Short cycling: a dirty flame sensor, a clogged filter overheating the furnace, or a safety switch reacting — see the sequence and safety tables on this page |
| Needs several tries to stay lit | An igniter getting weak or a flame sensor that proves flame only sometimes. Intermittent starts rarely fix themselves; they become no-starts on a colder night |
| Heat upstairs but not on the first floor — or the reverse | Often air delivery, not the furnace: a closed or failed zone, a crushed or disconnected run, or a return problem. Tell us which floor when you call |
| Furnace sounds fine but no air moves — or the blower runs with no heat | Two halves failing separately: burners lit with a stopped air handler is an airflow fault; a blower running with cold air means the ignition sequence stopped. Which half is working is the first thing we test |
Smell gas, a burning odor that does not clear, or rust and corrosion on the vent pipe? Treat those as call-now, not watch-and-see.
If you smell gas: leave the house, and from outside call the gas company or 911 first — before any repair call, including ours. Do not run the furnace again until it has been checked.
A burning smell that keeps coming back, or heat that comes on, goes off, and leaves an odor behind, is a same-day call. A brief dusty smell in the first hour of the first fall start-up is the one normal exception — see the FAQ below.
A furnace vent pipe that is corroding is not a cosmetic problem: the vent is how exhaust leaves the house. If you can see rust-through or heavy corrosion on the vent, keep the system off and call — and do not tape over it or seal it yourself.
The flue is a job of its own — venting work, priced on its own line
Every gas furnace has two halves: the part that makes heat, and the flue — the pipe that carries exhaust out of the house. Most calls are about the first half, but the flue is a job in its own right, and it is work we take on by itself, not only inside a furnace swap. The calls that land here: a vent pipe corroding through (the warning box above), a flue that has to be run or resized when a furnace is replaced with a different type, a vent termination that needs moving or correcting, and the flue run for a new gas appliance going into a house that did not have one there before. Two rules cover all of it. The pipe, the joints, and the sizing are fuel-gas work: it is measured, fitted, and checked for draft and leaks by the tech, and none of it is a homeowner hardware-store job — a flue that leaks or drafts badly puts exhaust where the house air is. And because it is its own job, it is priced as its own line in writing, separate from any furnace repair on the same visit, so you can see exactly what the venting costs. If you are not sure whether your call is the furnace or the flue, describe it the way you see it — “rust on the pipe above the furnace” is enough to start.
The one finding that ends the visit: a cracked heat exchanger
It is rare, and it is the finding homeowners ask about most once they hear the words. The heat exchanger is the metal wall between the fire inside the furnace and the air that blows into your rooms. If it cracks, exhaust gas — including carbon monoxide — can mix into the house air. That is why a confirmed crack is not a “watch it until spring” repair: we shut the furnace down, show you the crack or the test reading that found it, and price the exchanger or the furnace honestly from there. Two things keep this in proportion: most no-heat calls are igniters and sensors, not exchangers, and a working carbon monoxide alarm on each floor is the guard that never sleeps on this — test yours when you change the filter in the fall.
Cold snaps are when Columbia heating gets tested
Our cold season runs late November through February, and most no-heat calls land in a handful of hard cold snaps. Furnaces that short-cycled quietly in December quit outright at 22 degrees. Heat pumps lean on electric backup heat, and a failed heat strip shows up as lukewarm air and a power bill that jumps. If your system struggled last winter, the honest time to fix it is the fall, not the first cold night. Our heating tune-up is built for that.
Which furnace is in your house? The three Columbia setups
The repair path changes with the fuel and the layout. If you know which row your house is in before you call, the first five minutes of the visit go faster.
| Setup | Where we see it | Parts that fail first | One thing to know |
|---|---|---|---|
| Gas furnace + separate AC | Most in-town Columbia homes with gas service, older ranches off Hampshire Pike and James Campbell Blvd | Igniter, flame sensor, inducer motor | Yearly safety checks matter: heat exchanger and gas connections are on the list every fall |
| Propane furnace | Rural Maury County — Santa Fe, Hampshire, Culleoka side of the county | Same ignition parts, plus low-fuel lockouts that look like a furnace fault | Check the tank gauge before you call. A furnace that ran the tank dry needs the fuel company first |
| Electric air handler + heat strips | All-electric homes, often paired with a heat pump, common in newer subdivisions | Heat strip elements, sequencers, blower parts | One dead strip hides in mild weather. The cold snap finds it. We test every strip, not just the first one |
Your check, our check — who should touch what
| Safe for a homeowner | Leave to the tech |
|---|---|
| Thermostat mode, setting, and batteries | Opening the blower cabinet or any panel with wiring behind it |
| Filter swap — power off at the switch while you do it | Gas valve, igniter, flame sensor, or any gas line work |
| One breaker reset, then hands off if it trips again | Bypassing a pressure switch, limit, or float switch "just to get heat tonight" |
| Writing down the blink pattern through the sight glass | Resetting a locked-out furnace over and over to keep it limping |
That right-hand column is not us being careful with words. Every bypass on it removes a safety check the furnace uses to keep fire and exhaust where they belong. If a workaround involves a jumper wire, it is not a workaround — it is the call.
The safety switches standing between a fault and a fire
A furnace that “just shuts off” is usually one of these switches doing its job. Knowing their names turns a scary shutdown into a diagnosis — and it is why we never bypass one to get heat back for the night.
| Switch | What it watches | What trips it |
|---|---|---|
| Pressure switch | That exhaust gas can actually leave through the vent | A blocked or cracked vent, a weak inducer motor, a drain backing up into the switch hose |
| High-limit switch | The temperature inside the furnace cabinet | Overheating from a clogged filter, a failing blower, or ducts too tight for the air to move — the furnace shuts the burners down before metal is damaged |
| Flame rollout switch | Flame staying inside the burner box, where it belongs | Flames rolling out toward the cabinet — a blocked heat exchanger or vent problem. This one is a stop-and-call finding, never a reset-and-see |
| Flame sensor | Proof that the gas that flowed actually lit | A dirty or failing sensor cannot prove flame, so the furnace closes the gas valve and tries again — the starts-then-quits pattern from the sequence above |
Proof on a heating repair, not promises
- Licensed & insured in Tennessee, working out of 1230 Industrial Park Rd, Columbia — the same name and number on every page, invoice, and truck
- The failed step named: your invoice says which step of the ignition sequence stopped and which switch or part caused it, so “it needed a part” is never the whole story
- Safety checks in writing on fuel-burning equipment — heat exchanger inspection and carbon monoxide check results recorded, and a cracked exchanger shown to you, not just described
- Stocked ignition parts on the truck — igniters and flame sensors for the systems we see most — so the common no-heat faults are fixed the same visit, with the price in writing first
No heat tonight is not a wait-and-see problem.
Call and tell us where the furnace stops — clicks and quits, glows then dies, or nothing at all. Safety checks come first, and the repair price goes in writing before we swap a part.
Licensed & insured in Tennessee · ★★★★★ 5-star rated · 25 years in business · 1230 Industrial Park Rd, Columbia, TN
Heating repair FAQs
Is it safe to run my furnace if it bangs at start-up?
Get it checked before you keep running it. A bang can be harmless duct expansion, but it can also be delayed ignition, which stresses the heat exchanger. If the bang is new, louder, or comes with a gas smell, turn the system off and call.
My furnace is 18 years old. Repair it or replace it?
Furnaces often run 15 to 20 years. At 18, a small repair like a flame sensor still makes sense; a major part like a heat exchanger or blower motor usually does not. We price both paths in writing on the replacement page basis — same scope, no pressure either way.
Why does my house smell like dust when the heat first comes on?
A brief dusty smell at the first fall start-up is common — dust burns off the heat exchanger and out of the ducts. It should clear within an hour. A smell that keeps coming back, an electrical smell, or a burning smell at any other time is a call, not a quirk.
Do you work on propane and electric systems too?
Yes. Maury County homes run gas furnaces in town, propane and all-electric systems out in the county, and heat pumps everywhere. We service all three, plus electric air handlers with heat strips.
What does the blinking light on my furnace mean?
That light is an error code. Count the pattern — how many short blinks, how many long ones — and write it down, or take a short video through the sight glass, before you reset anything. A reset can clear the very code the tech needs. The chart that explains the code is usually stuck inside the blower door, which is our side of the panel, not yours. Tell us the pattern when you call and we will come with the right parts in mind.
My furnace clicks and tries to start, then shuts down. Why?
The furnace is lighting, proving itself, and failing one of its safety checks — a dirty flame sensor that cannot prove flame, a weak igniter, or a pressure switch that does not see the venting it expects. It will often try a few times and then lock out for a while. That lockout is the furnace protecting the house, so the fix is finding which check failed, not resetting it over and over.
Related work on this site
No-heat problems sit next to three other pages: when it cannot wait until morning, the 24/7 emergency HVAC page says what happens on the call; all-electric homes should also read the heat pumps page on AUX and EM heat; and the short answers are gathered on the HVAC FAQs page.
Cold house? Do not ride out the night on a furnace that keeps quitting.
Call and tell us what it does when it tries to start. If you smell gas, leave the house and call the gas company or 911 first — then call us.
Licensed & insured in Tennessee · ★★★★★ 5-star rated · 25 years in business · 1230 Industrial Park Rd, Columbia, TN