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 sending heat through the house. Most of the diagnosis comes down to finding the broken link. In Dothan 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.
Rather than guess, Dothan HVAC tests the sequence stage by stage. We read igniter resistance, measure flame signal in microamps, check that the pressure switch responds to real inducer draft, confirm voltage at the gas valve, and test the blower and its capacitor. Because this is a fuel-burning appliance, the safety basics come with every visit: we inspect the heat exchanger, leak-test the gas connections, and verify flue draft. You cannot tell a furnace problem from a furnace hazard by looking at the thermostat. Before we leave, temperature rise is measured against the data plate so the fire and the airflow are balanced as the manufacturer intended.
Dothan HVAC services natural gas, propane, and electric furnaces from all major brands, from standard 80 percent units to condensing high-efficiency models with their traps, drain lines, and dual pressure switches. Our trucks carry the parts that really fail, such as igniters, flame sensors, pressure switches, capacitors, inducer assemblies, and blower motors, so a typical no-heat call ends with the house warming up. Call (251) 485-1654 for furnace repair anywhere in Dothan, and an experienced technician will be on the way today.
When the AC quits in summer, see AC Repair in Dothan.
How Much Does Furnace Repair Cost in Dothan?
For most Dothan homes, a furnace repair runs $150 to $600. Cleaning a flame sensor is a small job; replacing a blower motor or control board is a bigger one. You'll get a written, upfront price from Dothan 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 | Furnace lights, then shuts off within seconds |
| Hot surface igniter replacementNo ignition; one of the most common winter failures | $150–$400 | No ignition; one of the most common winter failures |
| Draft inducer motorLoud humming or grinding at startup, then lockout | $400–$1,000 | Startup fan fails, furnace won't fire |
| Blower motorBurners run but little or no air comes out of the vents | $400–$1,500 | No airflow, or the blower runs nonstop |
| Control boardErratic behavior, error codes, or no response at all | $300–$700 | Erratic behavior, error codes, or no response at all |
| Gas valve replacementValve fails to open, so the furnace never lights | $250–$700 | Valve fails to open, so the furnace never lights |
These are common price ranges, not quotes. We confirm the exact price after diagnosing your system.
Factors That Change the Price
- The age and efficiency of the furnace, since high-efficiency models use more specialized parts
- Whether a cracked heat exchanger is found, which usually means replacement rather than repair
- Same-day or after-hours service versus a planned visit
- Access to the furnace in attics, closets, or crawlspaces
For older furnaces facing a big repair, we'll show you what replacement would cost too, so you can compare. Call (251) 485-1654 to get your price.
When to Call for Furnace Repair in Dothan
Spotting the early warning signs gives you the chance to act before the situation spirals into something far more expensive. These are the signals our technicians see most often when a problem is underway:
- A bang or boom when the burners ignite late
- The furnace clicks and glows but the burners never light
- A fan that keeps running while the registers blow cool air
- Squeals, scrapes, or grinding noises behind the blower door
- Flames that start, last a few seconds, and go out again and again
- A flame that burns soft and yellow rather than steady blue
- Frequent on-off cycling that never reaches the thermostat setting
- Rust streaks, soot, or water around the cabinet or flue
Act Before It Gets Worse
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Don't wait, get Dothan HVAC on the phone at (251) 485-1654 and we'll take a look right away.
Your Furnace Repair Questions Answered
The Benefits of Professional 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 experienced technicians treat every symptom as a question about the whole system. Flame signal gets measured rather than assumed, so a healthy sensor is never replaced while a cracked igniter or weak gas valve skates by. Draft is verified at the pressure switch and the flue. Temperature rise is checked against the data plate, which is how airflow problems get caught before they shorten the exchanger's life. And the gas side is leak-tested with instruments, not a sniff and a shrug. The result is a furnace that has been proven safe and correct under a full cycle, and an honest report if the unit is nearing the point where replacement beats another repair.
How Our Furnace Repair Works
We work through a clear, repeatable process so nothing gets overlooked on your property. Here's how we handle furnace repair from start to finish:
Sequence Diagnosis
Instead of guessing, we follow the startup sequence step by step, with readings on the inducer, pressure switch, igniter, flame sensor, and gas valve, until the broken link shows itself.
Safety Inspection
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.
Expert Repair
Igniters, flame sensors, pressure switches, capacitors, and motors ride on the truck, so most furnaces are lit and heating again before we pack up.
Full Verification
We finish with 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.
Questions About Furnace Repair?
Our experienced technicians can assess your situation and recommend the best solution.
Call (251) 485-1654 NowHow to Prevent Furnace Repair Problems
A little routine maintenance goes a long way toward avoiding a mid-season breakdown. Follow these tips from our experienced technicians:
- Replace the filter every month while the furnace is working hard, since it costs less than any other part
- On high-efficiency models, keep the condensate trap and drain line clear and draining
- Avoid packing the utility room, because burners need open space for combustion air
- Listen at light-off; clean ignition is quiet, and booming means the burners need service
- 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
- Keep a working carbon monoxide alarm on every level of the home and check it each month
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. Here's a comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Exchanger Cracks | No way to see a crack from outside | Inspected on every repair visit |
| Ignition Faults | Guesswork based on blink codes | Every stage measured before replacing parts |
| Gas Safety | Small leaks missed entirely | Every fitting checked with a detector |
| High-Limit Trips | Limit replaced, cause left behind | The airflow fault behind the trip found |
| Blower Setup | Airflow assumed, not measured | Temperature rise set to the data plate |
| Verification | It lit once, call it fixed | Clean, safe operation verified over full cycles |
Get Furnace Repair Help Today
Don't let a failing system get worse. Call Dothan HVAC now for prompt, professional service.
Get Help: (251) 485-1654Areas We Serve for Furnace Repair
We serve Dothan and its neighboring communities for furnace repair, from quick same-day repairs to planned installs.