Furnace Repair in Jacksonville - On-Site Today, Diagnosis First

Trusted Furnace Repair for Jacksonville Homeowners

When your furnace quits on a cold Jacksonville night, you need someone who will answer the phone, give you a straight price, and show up when they say they will. Brandt HVAC Co Jacksonville has been repairing furnaces across Jacksonville since 2003, and we do it with one simple rule: you get a written price before any work starts, and you know exactly who is walking through your door before they arrive. Devin Marlowe leads our team, and every technician we send is background-checked, uniformed, and introduced to you by name and photo before the visit. If your furnace is blowing cold air, making strange noises, or won’t turn on at all, call us at (904) 456-0205. Same-day appointments are available across Jacksonville, and a live person answers the phone 24 hours a day, 7 days a week.

Call (904) 456-0205

We service all major brands including Trane, Lennox, Goodman, and Rheem. Every repair includes a written guarantee, and if the repair fails within the guarantee period, we return at no charge under our 365-Day Done Right Promise. That’s not a sales line. It’s how we’ve built our reputation in Jacksonville for over two decades.

Furnace Maintenance

Furnace Maintenance is the scheduled upkeep that prevents most repairs from ever happening. In Jacksonville, where furnaces sit idle for months at a time and then get called into duty during sudden cold snaps, dust, rust, and wear accumulate silently. We recommend a maintenance visit every fall, before the first real cold front. A Brandt HVAC Co Jacksonville maintenance visit includes cleaning the burners, checking the heat exchanger for cracks, testing the ignition system, verifying gas pressure, inspecting electrical connections, and measuring temperature rise across the system. Our tune-up pricing runs $80 – $200, and you receive a written report of exactly what we found and what we did. We never sell you a repair you don’t need during a maintenance visit. Our technicians are not paid on what they sell.

Seasonal Lifespan Protection

A furnace that gets annual maintenance lasts 3 to 5 years longer on average than one that gets ignored. The heat exchanger, which is the most expensive component to replace, is also the one most vulnerable to rust in Jacksonville’s humid climate. Our maintenance catches small issues before they become mid-winter failures.

What a Tune-Up Won’t Catch

No maintenance visit can prevent every possible failure. Bearings wear, circuit boards fail, and gas valves stick. But a proper seasonal inspection reduces your odds of a no-heat emergency by identifying the parts that are already failing but haven’t quit yet.

Heat Pump Repair

Heat Pump Repair in Jacksonville is a service we handle just as often as furnace repair because so many homes here use heat pumps as their primary heating source. A heat pump is essentially an air conditioner that runs in reverse during the winter to pull heat from the outside air. When it stops heating properly, the usual culprits are a failed reversing valve, low refrigerant, a frozen outdoor coil, or a faulty defrost control board. Brandt HVAC Co Jacksonville diagnoses heat pump problems fast and gives you a written price before any work begins. Most heat pump repairs in Jacksonville run $150 – $700 depending on the failed component. We service all major brands including Trane, Lennox, Goodman, and Rheem.

Reversing Valve Failures

The reversing valve is what tells your heat pump whether to heat or cool. When it sticks or fails, the system may blow cold air when you need heat, or vice versa. This is a job for a trained professional because the valve is buried in the refrigerant circuit and requires recovery, replacement, and recharging to exact specifications.

Winter Defrost Cycles

Jacksonville winters are mild, but when temperatures dip into the 30s, frost can build on the outdoor coil. A healthy heat pump goes into a brief defrost cycle and melts it. A heat pump with a bad defrost sensor or control board turns into a block of ice, and that’s when you’ll notice it’s not heating your home.

Heating Repair

Heating Repair in Jacksonville covers every type of system that produces warmth for your home. That includes gas furnaces, electric furnaces, heat pumps, and even ductless mini-split systems running in heat mode. We diagnose all of them. The most common heating problems we see across Jacksonville are failed ignitors, dirty flame sensors, bad thermostats, blown capacitors, and airflow restrictions from clogged filters or blocked registers. Brandt HVAC Co Jacksonville fixes all of it, and you get a written price before we touch a single screw. Most heating repairs run $150 – $700. We respond fast because a home without heat in Jacksonville’s damp winter air feels cold fast, and for older adults or homes with young children, it’s a health risk, not just an inconvenience.

Electric Furnace Elements

Electric furnaces use heating elements similar to those in a toaster, just much larger. When a sequencer or a limit switch fails, one or more elements stop producing heat. These repairs are straightforward for our team and usually the most affordable heating repairs we do.

Thermostat and Control Wiring

A surprising number of heating failures come down to a bad thermostat, a loose wire, or a control board that has lost communication with the system. We always check the controls before condemning the mechanical components. It saves you money and prevents replacing parts that are perfectly fine.

Boiler Repair

Boiler Repair in Jacksonville is less common than furnace repair, but we service homes in older neighborhoods like Riverside, Avondale, and San Marco that still run hydronic heat. A boiler heats water and circulates it through radiators or baseboard units. Common failures include a bad circulator pump, a failed expansion tank, a stuck zone valve, or low water pressure. Brandt HVAC Co Jacksonville repairs boilers of all ages and configurations, and you get the same written-price guarantee we give on every other job. Most boiler repairs run $150 – $700. If you hear banging, see water around the unit, or your radiators won’t heat evenly, call us before the problem spreads.

Circulator Pump Replacements

The circulator pump is the heart of a boiler system. When it fails, hot water stops moving and your home stops getting warm. A pump replacement is a common, predictable repair that we can usually complete in a single visit. We stock pumps for most boiler brands.

Pressure and Expansion Issues

Boiler systems need stable pressure to work correctly. A failed expansion tank causes pressure to spike when the water heats, which can trigger the pressure relief valve and dump water on your floor. We test and replace expansion tanks before they cause water damage in your Jacksonville home.

Gas Furnace Repair

Gas Furnace Repair in Jacksonville is what we do most during the winter months. Gas furnaces have several components that fail at predictable intervals: ignitors crack, flame sensors get coated with carbon, gas valves stick, and pressure switches fail. When any of these parts fail, your furnace either won’t start, short-cycles, or blows cold air. Brandt HVAC Co Jacksonville repairs gas furnaces from Trane, Lennox, Goodman, Rheem, and every other major manufacturer. Most gas furnace repairs in Jacksonville run $150 – $700. Because gas furnaces involve both fuel and combustion, we always include a combustion safety check with every gas repair, verifying carbon monoxide levels in your home’s air stream.

One thing you should know: a cracked heat exchanger is a serious safety hazard because it can release carbon monoxide into your living space. If you ever smell gas, leave the house immediately and call your utility company first, then call us. Don’t try to inspect it yourself.

Ignitor and Flame Sensor Failures

Ignitors are the most common failure point on modern gas furnaces. They crack from repeated heating and cooling cycles. A cracked ignitor means the gas never lights. Flame sensors get coated with carbon and fail to confirm the burner is lit, causing the system to shut down seconds after startup. Both are quick, affordable fixes.

Gas Valve and Pressure Switch Problems

A failing gas valve often works intermittently before it quits entirely. Pressure switches fail when the venting system is blocked by debris or a clogged condensate line. We diagnose and replace these components properly, and every gas furnace repair includes a written guarantee of at least 365 days under the Done Right Promise.

Furnace Tune Up

A Furnace Tune Up in Jacksonville is the single best thing you can do to avoid a repair in the middle of a cold spell. It’s a comprehensive inspection and cleaning that runs $80 – $200, and it takes about an hour. Brandt HVAC Co Jacksonville sends a uniformed, background-checked technician to your home, introduced by name and photo before arrival. During the tune-up, we clean the flame sensor, test the ignitor, inspect the heat exchanger for cracks, measure gas pressure, check the venting for blockages, and verify the thermostat and safety controls are working. You get a written report showing what was done and what we recommend. If we find something that needs repair, we show you the problem, give you a written price, and wait for your approval before touching it.

Flat Rate, No Surprises

Our tune-up price is flat. $80 – $200 depending on the size and condition of your system. You’ll know the exact price when you book. There’s no upsell at the door, and our technicians are not paid commission on repairs they recommend during a tune-up.

When to Book

Book your tune-up in October or November, before the first hard cold front. Jacksonville furnaces sit dormant through the summer, and that’s when rodents sometimes nest in venting or dust cakes onto burners. A tune-up before winter catches those problems while they’re cheap to fix.

Emergency Furnace Repair

Emergency Furnace Repair in Jacksonville is exactly what it sounds like: you have no heat, the temperature is dropping, and you need help now. Brandt HVAC Co Jacksonville answers the phone live 24 hours a day, 7 days a week. No voicemail, no callback queue, no automated phone tree. You talk to a person who dispatches a technician to your home the same day, nights and weekends included. Emergency furnace repair pricing runs $150 – $700 depending on the failed part, and you get a written price before any work begins. We don’t charge overtime rates for nights or weekends. If your furnace quits during a Jacksonville cold snap, call (904) 456-0205 and we’ll get someone moving.

What Counts as an Emergency

No heat in a home with small children, elderly family members, or anyone with a respiratory condition is an emergency. A furnace that makes a loud banging sound, smells like gas, or trips the breaker repeatedly also counts. When in doubt, call. If it turns out to be a simple fix, we’ll tell you that and charge you accordingly.

After-Hours Response

Our phones are staffed by live people around the clock. When you call at 2 a.m., a real person answers and starts the dispatch process. We have technicians on call throughout Jacksonville, Orange Park, and the beaches, so we can usually get to your door within hours, not days.

Brands We Service

We’re factory-familiar with Trane, Lennox, Goodman, and Rheem, and we’ve repaired hundreds of units from each manufacturer across Jacksonville. Trane furnaces are known for their robust heat exchangers, but their ignitors and control boards fail on a predictable schedule. Lennox systems are efficient, but the smart thermostats and variable-speed motors they pair with can require specialized diagnostic equipment. Goodman furnaces are straightforward and reliable, which means repairs are usually quick and affordable when something does go wrong. Rheem units are common in newer Jacksonville construction, and we stock OEM parts for their most frequently replaced components.

Whether you have a Trane, Lennox, Goodman, Rheem, or any other make, we can help. We also service Carrier, York, Daikin, Bryant, and American Standard. The brand on the cabinet matters less than the technician holding the gauge, and ours are trained across every major residential platform.

Signs You Need a Pro Right Now

• Your furnace is blowing cold air. This usually means the burners are not lighting or the system is short-cycling. It could be a dirty flame sensor, a cracked ignitor, or a tripped limit switch. All are repairable, but running the system in this condition can damage the blower motor over time.
• You smell gas or something burning. A gas smell is an immediate safety concern. Leave the house and call your utility company first, then call us. A burning smell that fades after a few minutes is often dust burning off the heat exchanger at the first startup of the season, but a persistent burning smell needs a professional inspection.
• The furnace makes banging, rattling, or whistling noises. Banging can indicate delayed ignition, which is a small gas explosion inside the burner chamber. Rattling might be a loose panel or a failing blower wheel. Whistling often means restricted airflow from a clogged filter. None of these fix themselves.
• The furnace cycles on and off every few minutes. Short-cycling is usually caused by an overheating heat exchanger, a bad thermostat, or a dirty flame sensor. It wastes gas, strains components, and shortens the life of the furnace by years if you ignore it.
• Your heating bills jumped unexpectedly. If your bill is up 20% or more with no change in weather or usage, something is wrong. It could be a failing blower motor, a cracked heat exchanger, or a burner that’s not burning efficiently. A diagnostic visit costs less than another month of the inflated bill.

Our Process, Step by Step

1. 1
   You call and talk to a live person. We answer 24/7. You tell us what’s happening, and we schedule a visit at a time that works for you. Before the technician arrives, you receive their name and photo by text or email, so you know exactly who is coming.
2. 2
   The technician arrives, badges, and introduces themselves. Every Brandt HVAC technician shows you a photo ID at the door. Their name, photo, and credentials match what you were sent. This is the Threshold Verified standard, and it’s how we protect you from opening the door to someone you didn’t expect.
3. 3
   We diagnose the problem and show you the proof. The technician inspects the system, identifies the failure, and shows you exactly what’s wrong. We encourage you to look at the problem yourself. If it’s a cracked ignitor, we’ll show you the hairline fracture. If it’s a blocked condensate line, you’ll see the water.
4. 4
   You get a written price before any work starts. No exceptions. No “we’ll see how it goes.” You approve the repair in writing, knowing the exact cost, before we pick up a tool. If the repair requires a part we don’t have on the truck, we give you the price and schedule the return visit.
5. 5
   We complete the repair and hand you a written guarantee. Every repair includes a written guarantee describing exactly what it covers and for how long. Most repairs are guaranteed for 365 days under our Done Right Promise. If the same repair fails within the guarantee period, we return and fix it at no charge. No argument. That’s the deal.

How Much Does Furnace Repair Cost in Jacksonville?

Our Service Area Near Jacksonville

Brandt HVAC Co Jacksonville serves the entire Jacksonville metro area, including Jacksonville Beach, Orange Park, Atlantic Beach, Neptune Beach, Fernandina Beach, Yulee, Middleburg, Fleming Island, St. Augustine, Ponte Vedra Beach, and Green Cove Springs. We know the neighborhoods, from the older homes in Riverside with their hydronic systems to the new construction in Nocatee with high-efficiency heat pumps. Typical response time across Jacksonville is same-day for calls placed before 2 p.m., and we run after-hours routes for emergencies. For service in the Orange Park area, see our Furnace Repair in Orange Park page. If you’re on the coast, our Furnace Repair in Jacksonville Beach page has area-specific details.

Frequently Asked Questions About Furnace Repair in Jacksonville

Schedule Your Furnace Repair Service in Jacksonville Today

If your furnace is struggling, don’t wait for the cold to get worse. Call (904) 456-0205 now and talk to a live person who can schedule your repair today. You’ll get a written price before any work starts, a technician introduced by name and photo before arrival, and a written guarantee on every repair. The estimate is free, the diagnosis is honest, and we answer the phone 24 hours a day, 7 days a week. That’s how we’ve done it in Jacksonville since 2003.

Written by Devin Marlowe, Owner at Brandt HVAC Co Jacksonville, serving Jacksonville since 2003.