Furnace & heating
Heat pumps
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Carrier
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GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable Furnace Repair Across Terrell Hills
Furnace repair in Terrell Hills typically runs $150 – $700, and most jobs are completed in a single visit. Brandt HVAC Co San Antonio has crews working throughout Terrell Hills every week, and we know what these homes throw at a furnace. Call (361) 470-8872 and a live person answers, 24/7. We’ll give you a written price before any work starts, and we’ll tell you exactly who’s coming to your door, by name and photo, before the tech arrives.
Terrell Hills isn’t like the newer subdivisions around San Antonio. The homes here were mostly built between the 1920s and 1950s, and they were built well. But original galvanized ductwork, plaster walls, and decades of remodels mean furnace problems in Terrell Hills often run deeper than a bad ignitor. When a homeowner on Garraty Road calls us about a furnace that won’t fire, we know to check static pressure, thermostat wiring, and the flue long before we start swapping parts. That’s the difference between a repair that holds and one that trips the limit switch again in three weeks.
Why Brandt HVAC Co San Antonio Is Terrell Hills’s Preferred Furnace Repair Company
Terrell Hills homeowners tend to ask more questions than most, and they should. These are substantial homes, often with multi-zone systems and high-end finishes. A wrong diagnosis on a 3,400-square-foot custom home off Wiltshire Avenue costs far more than a misdiagnosis on a starter home. Our Furnace Repair team treats every Terrell Hills job as a commissioning project, not a parts swap. We test static pressure, verify gas pressure at the manifold, and check the heat exchanger with a combustion analyzer before we call the job done.
Each Brandt HVAC location is independently owned and operated, led by Devin Marlowe, who set the standard for how this company operates: verify, badge, introduce. Every technician who goes to a Terrell Hills home is background-checked and identity-verified under the Threshold Verified standard. Before the visit, you get the tech’s name and photo. At the door, they show you their photo ID badge. If someone shows up who you were not told to expect, the visit is on us. That matters in Terrell Hills, where residents are understandably protective of who walks through their door. Phones are answered by a live person 24 hours a day, nights, weekends, and holidays included. Scheduling and dispatch are coordinated from our San Antonio office, but the crews serving Terrell Hills live and work in this area.
Styles & brands we work with
Boiler Repair in Terrell Hills
Boiler Repair in Terrell Hills covers a specific subset of the city’s heating systems, mostly older homes with radiators or hydronic loops that were installed generations ago and updated piecemeal since. When a Terrell Hills boiler fails, it’s rarely a single catastrophic event. It’s more often a slow decline: rust in the expansion tank, a circulator pump that’s been grinding for months, air trapped in the loop that causes uneven heat in rooms across the house. On a pier-and-beam foundation home, a leaky boiler line can also carry water into crawl spaces that nobody checks until the damage is done. A boiler repair in Terrell Hills runs $150 – $700 depending on what’s failed. We always write the price down before we touch anything, and every repair includes a written guarantee. If it fails within 365 days, we return at no charge under the 365-Day Done Right Promise.
Circulator Pumps and Air Locks
On boiler systems in Terrell Hills, the most common call we get is for a circulator pump that’s failed or air locked. When air gets trapped in the loop, you’ll hear gurgling and the rooms farthest from the boiler stay cold. The fix can be as simple as purging the air or as involved as replacing the pump cartridge. On a 1940s home with original cast-iron radiators, we’re careful to protect the floor around the boiler with drop cloths and to check the pressure relief valve before we leave.
Expansion Tank and Pressure Problems
Older Terrell Hills boiler systems still have steel expansion tanks mounted above the boiler. When the tank’s air cushion fails, system pressure swings wildly, and the relief valve starts dripping. Replacing the tank or converting to a modern diaphragm tank is usually a same-day repair. We’ll match the new tank to the system’s water volume, not just drop in a generic size, because undersized tanks fail within a year.
Gas Furnace Repair in Terrell Hills
Gas Furnace Repair in Terrell Hills means working with systems that are often 20 – 30 years old, in homes that have been remodeled at least twice since the furnace was installed. The challenges here are specific: undersized return air from decades of add-ons, 2-wire thermostats that were state of the art in 1955, and flues that were routed around mature live oaks before anyone thought about code clearances. Gas furnace repairs in Terrell Hills run $150 – $700. That covers everything from an ignitor replacement (typically $150 – $300, parts and labor included) to a gas valve replacement on a two-stage furnace. We write the price down before we start, and every gas furnace repair includes a written guarantee. If the repair fails within its guarantee period, we return free of charge, no argument.
Heat Exchanger Repair and Replacement
A cracked heat exchanger is the one finding we never rush past. On a gas furnace in Terrell Hills, a crack can put carbon monoxide into the airstream, and we treat that as a stop-work condition. We’ll show you the crack with a camera if we can, explain your options, and give you a written price for replacement. If the furnace is under warranty, we handle the parts paperwork. If it’s not, we’ll tell you the honest repair-versus-replace math before you spend a dollar.
Ignitor and Gas Valve Failures
When a Terrell Hills furnace won’t light on a cold February night, the ignitor or gas valve is usually the culprit. Hot surface ignitors have a finite life and commonly fail after 5 – 7 years. Gas valves fail less often but when they do, there’s no partial fix. We stock ignitors for Carrier, Bryant, American Standard, Trane, Lennox, Goodman, Rheem, York, and Daikin furnaces on our local trucks, so most ignitor jobs are done the same day we arrive.
Trusted Brands We Service in Terrell Hills
We service every major residential furnace brand found in Terrell Hills homes: Carrier, Bryant, American Standard, Trane, Lennox, Goodman, Rheem, York, and Daikin. Our techs don’t play favorites with brands. What we do is stock the parts that Terrell Hills homes actually use, including ignitors, flame sensors, pressure switches, and gas valves for those specific models. That means fewer “we’ll order the part and come back next week” conversations. If a part isn’t on the truck and we can get it from our supplier that day, we’ll tell you before you commit to the repair. Written price first, always.
See the difference
Before
After
Before
After
Before
AfterCommon Furnace Repair Problems We See in Terrell Hills Homes
- High static pressure from mismatched ductwork. Decades of remodels leave original galvanized ductwork connected to newer flexible ducts that were never sized for the current system. The furnace trips its high-limit switch repeatedly, and the blower motor burns out early. The fix usually involves rebalancing return air, not just reseting the limit switch.
- Undersized electrical panels. Several 1920s – 1950s Terrell Hills homes still run original 60-amp or 100-amp panels. A modern furnace with an ECM blower and a smart thermostat draws more on startup than these panels were designed for. Repairs can stall until a dedicated circuit or subpanel is added, and we’ll tell you that before we start, not after.
- 2-wire thermostat wiring. Original 2-wire thermostat cable lacks a common wire, which means modern smart thermostats simply won’t function without an add-a-wire kit or new cable pulled through plaster walls. We see this on nearly every smart thermostat install in older Terrell Hills homes.
- Failing heat exchangers on 20+ year old gas furnaces. Terrell Hills homes from the 90s and early 2000s often have furnaces at or past their expected lifespan. A failing heat exchanger is a carbon monoxide risk. Last winter, our techs replaced a cracked heat exchanger on a 1949 custom home off Garraty Road where the original galvanized ductwork was still in place. After a static pressure test showed 0.9″ WC on high fire, we installed a new Carrier 80% furnace with a variable-speed blower, rebalanced return air, and pulled new thermostat cable through plaster walls. Static pressure dropped to 0.5″ WC and even heat returned to all three zones.
Pricing for Furnace Repair in Terrell Hills, TX
Furnace repair in Terrell Hills runs $150 – $700 for the vast majority of jobs. Ignitor replacements usually land between $150 – $300, parts and labor included. Gas valve replacements and blower motor replacements run higher, and a heat exchanger replacement on an out-of-warranty furnace can reach the top of that range. We write down the exact price before any work starts, on every single job, with no exceptions. If we find something additional, we stop, show you, and give you a new written price before continuing. Call (361) 470-8872 for a free estimate over the phone, and we’ll give you a realistic range based on what you’re describing, not a vague “it depends.”
| Repair Type | Typical Price Range (Terrell Hills) |
|---|---|
| Gas Furnace Repair | $150 – $700 |
| Boiler Repair | $150 – $700 |
| Furnace Tune-Up | $80 – $200 |
We Also Serve Cities Near Terrell Hills
Beyond Terrell Hills, our crews respond regularly to furnace calls in San Antonio, Schertz, Cibolo, and Boerne. The same written-price promise, the same Threshold Verified technicians, and the same 24/7 live phone answer apply in every one of those cities.
Serving Terrell Hills, TX - Our Local Coverage Area
We’re based in the Terrell Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in Terrell Hills
Terrell Hills’ tree preservation ordinance protects the root zones of mature live oaks and post oaks, which means any exterior penetration for a new flue, gas line, or combustion air intake must be routed around protected roots. In practice, that often means running a flue at a shallower angle or selecting a different wall exit than a standard install would use. We’ve handled enough Terrell Hills flue retrofits to know which routes the city will approve and which will get flagged. Call (361) 470-8872 and we’ll walk you through what applies to your property.
The usual cause in Terrell Hills is high static pressure from decades of mismatched ductwork, not a bad limit switch itself. When return air is undersized, the furnace overheats and trips the limit switch as a safety response. We measure static pressure on every repair call where this symptom shows up. The fix may be as simple as adding a return air drop or as involved as replacing a section of undersized duct, and we’ll put the exact repair and price in writing before we start. A tune-up in Terrell Hills runs $80 – $200 and includes a static pressure check.
You can, but the original 2-wire thermostat cable in many Terrell Hills homes lacks a common wire, which means the smart thermostat won’t get consistent power. The standard solutions are an add-a-wire kit, which works in some cases, or pulling new thermostat cable through the plaster walls, which is more involved but more reliable. We’ll tell you which route makes sense for your home before any work starts. We’ve done both on dozens of Terrell Hills homes from the 1940s and 1950s.
The most common cold-snap failure in Terrell Hills is a dead ignitor on a gas furnace, followed by a failed pressure switch on high-efficiency models. Ignitors have a finite life and tend to fail at the worst possible moment, and pressure switches are sensitive to the kinds of flue restrictions and condensate clogs we see on older Terrell Hills systems. We keep ignitors for all major brands on our local trucks, so most of these calls are same-day fixes. Emergency service is available around the clock, and a live person answers the phone 24/7.
We don’t size a replacement furnace by square footage alone. For a large, multi-zone Terrell Hills home, we run a room-by-room load calculation that accounts for plaster wall mass, original single-pane windows, mature shade trees, and the actual duct capacity of each zone. Oversized furnaces short cycle, which wrecks humidity control and wears out blower motors and heat exchangers. A properly sized two-stage or modulating furnace, commissioned with a static pressure test and zone balance check, is the standard we hold for every replacement. We’ll give you a written price and a set install date, and we handle any rebate and financing paperwork before the job starts.
If your furnace is acting up in Terrell Hills, call (361) 470-8872. A live person answers, we’ll tell you who’s coming before they arrive, and you’ll get a written price before any work begins. Free estimates, no pressure.
Written by Devin Marlowe, Owner at Brandt HVAC Co San Antonio, serving Terrell Hills and the surrounding area.