Furnace Repair in San Antonio - On-Site Today, Diagnosis First

Trusted Furnace Repair for San Antonio Homeowners

When your furnace quits during a January cold snap in San Antonio, the house gets uncomfortable fast. Most Furnace Repair in San Antonio jobs run between $150 and $700 depending on the part, and we get to most homes in the Alamo Heights, Castle Hills, and Terrell Hills areas the same day you call. Halden Heating & Air has repaired furnaces across San Antonio since 2004, and every job includes a written price before work starts and a written guarantee on the repair. Call us at (903) 623-6784 and a real person answers, day or night. No voicemail trees. No four-hour windows. You’ll get a live arrival time and a tech you can track to your door.

Call (903) 623-6784

Andre Fuller leads our San Antonio team, and he holds every technician to The Relay Standard: background-checked, uniformed, and sent with a locked price you approve before any tool gets picked up.

Furnace Maintenance

Furnace Maintenance is the scheduled service that keeps your heating system running clean and catching small problems before they become $700 repairs. In San Antonio, where furnaces sit idle for most of the year and then work hard through short but sharp cold spells, a fall maintenance visit is the single best way to avoid a mid-winter breakdown. Halden Heating & Air San Antonio performs maintenance on all major brands, and a tune-up typically runs $80 to $200. Every visit ends with a written report of what we found, what we fixed, and what can wait.

Seasonal Startup Check

Before the first cold front, we test the full heating cycle, check the flame sensor, and make sure the system fires without delay. We also inspect the heat exchanger for cracks that could leak carbon monoxide. The goal is a furnace that starts on the first cold morning.

Filter and Airflow Service

A clogged filter forces the blower motor to work harder, which shortens its life and raises your energy bill. We replace or clean filters, check static pressure, and confirm airflow matches what the system was designed to move. This one step prevents more furnace repairs than any other.

Heat Pump Repair

Heat Pump Repair covers systems that both heat and cool your home by moving heat instead of creating it. In San Antonio’s mild winters, heat pumps handle the load well, but when the reversing valve sticks or the outdoor coil ices over, you lose heat fast. Halden Heating & Air San Antonio repairs heat pumps with the same up-front pricing as every other job: most repairs run $150 to $700, written down before we start. We service Carrier, Trane, Goodman, and the rest of the major brands.

No Heat in Heat Mode

When a heat pump runs but blows cool air, the reversing valve or the defrost board is often the culprit. We test both under load, check refrigerant pressures, and show you photos of what we find. You’ll know the exact part and price before we replace anything.

Iced-Up Outdoor Unit

A heat pump naturally builds light frost, but thick ice means the defrost cycle is failing. We check the defrost thermostat, the sensor, and the control board. Left unfixed, a frozen coil can damage the compressor, and that turns a $200 fix into a much bigger job.

Heating Repair

Heating Repair is the broad category that covers any system that produces heat, whether it’s a gas furnace, an electric furnace, or a heat pump in heating mode. If your home in San Antonio is cold and the thermostat is set to heat, we diagnose the issue the same day in most cases. Most heating repairs run $150 to $700, and Halden Heating & Air San Antonio gives you the written price before any work begins. The 365-Day Done Right Promise applies to every repair, so if it fails within the coverage window, the second visit is free.

Complete System Diagnostics

We don’t guess. Our techs run a full diagnostic sequence on the thermostat signal, the safety switches, the ignition system, and the blower. By the time we quote a price, we’ve found the actual failure, not just the symptom. You approve the repair with the real number on the table.

Electric Furnace Repairs

Electric furnaces don’t have gas valves or burner assemblies, but they do have heating elements and sequencers that fail over time. We stock common replacement parts for York, Rheem, and Daikin electric furnaces, which means fewer return trips and faster repairs.

Boiler Repair

Boiler Repair addresses hydronic heating systems that circulate hot water or steam instead of forced air. Boilers are less common in San Antonio than furnaces, but homes in older neighborhoods like Monte Vista and Olmos Park still run on them, and we also offer our Furnace Repair in Helotes for nearby homeowners. When a boiler loses pressure, makes banging sounds, or stops heating, Halden Heating & Air San Antonio sends a tech who knows the difference between a furnace and a hydronic loop. Repair costs fall in the same $150 to $700 range, quoted in writing before we touch the system.

Pressure and Expansion Tank Issues

A boiler that keeps losing pressure usually has a failed expansion tank or a slow leak in the loop. We check the air charge in the tank, inspect the pressure relief valve, and trace the loop for leaks. Boiler pressure problems are almost always fixable the same day.

Kettling and Strange Noises

That banging sound from your boiler is usually kettling, which means mineral scale is building up inside the heat exchanger. In San Antonio’s hard water, this happens faster than you’d expect. We flush the system or treat the water, depending on how far the scale has advanced.

Gas Furnace Repair

Gas Furnace Repair covers the most common heating system in San Antonio: natural gas forced-air furnaces. When a gas furnace won’t fire, or fires and then shuts off, the problem is usually the ignitor, the flame sensor, or the gas valve. Halden Heating & Air San Antonio repairs all of these, with most jobs landing between $150 and $700. Every repair includes a written guarantee, and a failed repair gets a free return visit, no argument required.

Ignitor and Flame Sensor Failures

The hot surface ignitor glows to light the gas, and the flame sensor tells the board the burners actually lit. Both wear out with normal use, and both are common failure points on Bryant and Carrier gas furnaces. We keep replacements on the truck for most models, which means one trip instead of two.

Gas Valve and Safety Switch Checks

A gas furnace that won’t light at all may have a failed gas valve or a tripped rollout switch. Gas valves and rollout switches are safety-critical components, so if you smell even a faint gas odor near your furnace, turn off the unit and call us immediately. Our techs are trained to isolate the problem safely and verify the system is safe before restarting it.

Furnace Tune Up

A Furnace Tune Up is a preventive service visit that costs $80 to $200 and is designed to keep your system running through the heating season. Halden Heating & Air San Antonio recommends a tune up every fall, before you actually need the heat. The visit includes a full safety inspection, cleaning, and a written report of anything we recommend, with zero sales pressure. Our technicians are not paid on what they sell, which means the tune up report you get is honest.

What We Check During a Tune Up

We inspect the heat exchanger, test the flame, check carbon monoxide levels, clean the burners, and measure the temperature rise across the system. We also test the thermostat calibration and tighten electrical connections. The result is a furnace that runs more efficiently and is less likely to fail on a cold night.

Written Report After Every Visit

You’ll leave every tune up with a written summary of what we tested, what we found, and what we recommend. If something needs repair, we give you the price in writing. If nothing needs repair, we say that too, and you won’t get a hard sell on a new system you don’t need.

Emergency Furnace Repair

Emergency Furnace Repair is for the nights when the furnace dies and the temperature inside your San Antonio home is dropping toward the outside temp. Halden Heating & Air San Antonio answers the phone 24/7 with a live person, and we prioritize no-heat calls from Alamo Heights, Terrell Hills, Castle Hills, Kirby, and the rest of the metro, including Furnace Repair in Universal City. Emergency repair pricing stays in the $150 to $700 range, and you get the written price before any work starts, even at 2 a.m. There’s no overtime upcharge for the diagnostic.

Nights, Weekends, Holidays

Furnaces don’t check the calendar before they fail, and neither do we. When you call us at midnight on a Saturday, a person answers the phone, takes your address, and gets a tech moving. You’ll track the truck to your door, same as a daytime call.

No Heat is a Real Emergency

When a Houston-area cold front pushes into San Antonio and temperatures drop into the 30s, a failed furnace is more than an inconvenience. It’s a health risk for elderly residents, infants, and anyone with a respiratory condition. That’s why we never make an emergency caller wait for a callback. Call (903) 623-6784 and talk to us now.

Brands We Service

We’ve repaired hundreds of Carrier and Trane furnaces in San Antonio homes, and we keep their most common OEM parts on our trucks: ignitors, flame sensors, pressure switches, and control boards. That means the parts that fail most often are usually in the truck when we arrive, not ordered and backordered for a week.

Our techs are also certified to service Goodman, Rheem, York, Daikin, Bryant, Lennox, and American Standard systems. Whether you have a 20-year-old Rheem that has been heating your Castle Hills home since the early 2000s or a newer Daikin heat pump in Leon Valley, we can diagnose and repair it. And if you have any other make, we can help with that too.

Signs You Need a Pro Right Now

• Your furnace is blowing cold air. This usually means the burners aren’t staying lit, the flame sensor is dirty, or the gas valve is failing. A furnace that blows cold air is working against you, running the blower while the house gets colder.
• You hear banging, popping, or screeching. Banging can be delayed ignition, which can crack the heat exchanger over time. Screeching is usually a failing blower motor bearing. Both get more expensive the longer you wait.
• The furnace turns on and off repeatedly. This is called short cycling, and it usually points to an overheating heat exchanger or a bad thermostat signal. Short cycling wastes gas and stresses every component in the system.
• You smell gas or a metallic burning smell. A gas odor means turn the furnace off and call us from outside the house. Even a faint intermittent gas smell is a safety issue. A metallic burning smell often means wiring overheating inside the cabinet.
• Your energy bill spiked without explanation. A failing blower motor, a cracked heat exchanger, or a system that never reaches the set temperature all waste energy. If your winter bills are suddenly up 30% with no change in usage, the furnace is telling you something.

Our Process, Step by Step

1. 1
   Call or book online. A real person answers, 24/7, and collects your address, the issue you’re seeing, and what time works for you. You’ll get a confirmation with a live arrival time, not a four-hour window.
2. 2
   Track your tech to the door. You’ll see who is coming, what they look like, and exactly when they’ll arrive. No wondering if someone is going to show up. No waiting in the dark.
3. 3
   Diagnosis and written price. The tech runs the full diagnostic sequence: thermostat signal, safety switches, ignition system, blower, and heat exchanger. Then you get the written price before any work begins. You approve it, or you don’t. No surprises either way.
4. 4
   Repair and photo documentation. We make the repair, take before-and-after photos of the actual parts, and show you what was wrong and what we replaced. You understand exactly what you paid for.
5. 5
   Written guarantee and follow-up. Every repair comes with the 365-Day Done Right Promise in writing. If the same repair fails within the coverage window, we come back at no charge. No arguing. No fine print. The guarantee is included, not an add-on.

How Much Does Furnace Repair Cost in San Antonio?

Our Service Area Near San Antonio

Halden Heating & Air San Antonio serves the entire metro, from Alamo Heights and Terrell Hills to Leon Valley, Helotes, Fair Oaks Ranch, Scenic Oaks, Castle Hills, and Kirby. Most calls in central San Antonio get a same-day visit. Calls in Hill Country communities like Fair Oaks Ranch and Scenic Oaks are usually next morning at the latest. We also provide Furnace Repair in Universal City and Furnace Repair in Timberwood Park with the same up-front pricing and written guarantee. If you’re near Lackland AFB, we serve that area too.

Frequently Asked Questions About Furnace Repair in San Antonio

Schedule Your Furnace Repair Service in San Antonio Today

Call (903) 623-6784 now for a free estimate on furnace repair in San Antonio. You’ll get a live arrival time, a written price before any work starts, and a written guarantee on every repair. No voicemail trees. No four-hour windows. No surprises. If your furnace has already quit, call now and we’ll get you warm tonight.

Written by Andre Fuller, Owner at Halden Heating and Air San Antonio, serving San Antonio since 2004.