Seasonal 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.
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AfterFast, Reliable Furnace Repair Across Southlake
Most furnace repairs in Southlake cost between $150 and $700, and our team can usually diagnose the problem and present a written price on the same visit. If your heat is out tonight, call (984) 538-9003. A live person answers, 24/7.
We’re the Furnace Repair team that knows Southlake’s homes from the inside out. The big custom builds off Continental Boulevard, the exposed rural properties along the western edge with no wind shelter, the original 1990s luxury developments where three-zone systems are now hitting their twenty-fifth winter. Our crews are dispatched from our Dallas-Fort Worth office and serve Southlake directly, so we’re not driving from Fort Worth or Dallas proper and billing you for the windshield time.
Brandt comes from an old word for firebrand. Keeping a home warm is literally what the name means. We’ve been at it since 2003 as part of the Threshold Group family, and every Southlake customer gets the same thing: a written price before any work starts, a photo and name of the technician before they arrive, and a 365-Day Done Right Promise on every repair.
Why Brandt HVAC Is Southlake’s Preferred Furnace Repair Company
Southlake homeowners don’t open the door for strangers. We don’t either. Every technician we send is background-checked and identity-verified through our Threshold Verified standard. You get a name, a photo, and a badge at the door. If anyone shows up who you weren’t told to expect, that visit is on us.
Our phones are answered by a live person, 24 hours a day, 7 days a week. Nights, weekends, holidays. No voicemail, no callback queue, no automated phone tree pressing 1 for this and 2 for that. When your furnace locks out at 11 PM on a February night and the temperature is dropping through the teens, you talk to a human who can get a technician moving.
We know the local housing stock. Southlake’s homes are big, often 4,000 to 7,000 square feet, with vaulted ceilings and open floor plans that make heating a genuine engineering challenge. The original multi-zone systems installed during the 1990s and 2000s boom are now simultaneously hitting the replacement window, and the repair calls we get here are fundamentally different from the single-system swaps common in neighboring Grapevine or Keller.
Heat Pump Repair in Southlake
Heat Pump Repair in Southlake often means dealing with equipment that was never sized for the sustained sub-20°F temperatures that February ice events like 2021’s Uri delivered. Heat pumps have a balance point, the outdoor temperature below which they can’t keep up without auxiliary heat. Many Southlake systems were sized for our typical mild winters, not our worst ones. When the mercury drops and stays down, the heat pump runs continuously, the auxiliary strips kick in, and the homeowner gets a shocking electric bill along with a cold house.
Our techs check refrigerant charge, defrost cycle operation, and the condition of the outdoor coil first. Low refrigerant is common on systems that have been running hard for fifteen or twenty years. We also verify that the auxiliary heat lockouts and staging controls are programmed correctly for our climate.
When Heat Pumps Can’t Keep Up
A heat pump that runs without stopping but never reaches setpoint usually has a capacity problem, not a thermostat problem. In Southlake’s exposed rural properties with no wind shelter, the actual heat loss can exceed the original Manual J calculation by 20 percent or more. We measure supply and return temperatures, check airflow at each register, and compare actual performance against the manufacturer’s specs before we call anything fixed.
Propane Backup Integration
Many Southlake homes pair a heat pump with a propane furnace for backup below the balance point. When that handoff fails, the heat pump runs itself ragged while the propane furnace never fires. We test the changeover controls and verify propane pressure at the regulator, because a system that can’t switch to backup during a Uri-style event is a system that will leave you cold.
Heating Repair in Southlake
Heating Repair in Southlake covers gas furnaces, propane furnaces, electric furnaces, and the hybrid systems that combine heat pumps with fossil-fuel backup. The cost for most heating repairs in Southlake falls between $150 and $700, with igniter replacements and capacitor changes at the lower end and heat exchanger or gas valve work toward the top. Every job starts with a written price. No exceptions.
Propane furnaces on rural Southlake properties have their own failure modes. The regulator and tank must be sized for the furnace’s peak BTU demand, not its average. During a cold snap, a furnace that short-cycles or locks out may be starving for fuel because the propane system can’t deliver enough vapor fast enough. We see this on properties where an outbuilding or workshop was added later, pulling from the same tank that was originally sized for just the house.
Propane Pressure and Capacity
Propane regulators drop output pressure as the tank level falls and as outdoor temperature drops. A furnace that runs fine at 40°F may lock out at 10°F because the propane can’t vaporize fast enough to meet demand. We check tank level, regulator sizing, and line pressure under load before we blame the furnace itself.
Heat Exchanger Safety
A cracked heat exchanger is a safety issue, not a repair-or-replace dilemma. We inspect with a borescope camera and show you what we find. If the heat exchanger is compromised, we explain why replacement is the only option and give you a written price for both repair and full system replacement so you can decide with full information.
Trusted Brands We Service in Southlake
We service all major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Southlake’s 1990s and 2000s luxury builds, we see a lot of original Carrier and Trane multi-zone systems, often paired with newer Goodman or Rheem equipment in additions or outbuildings. We stock common igniters, capacitors, control boards, and gas valves locally, and we can source proprietary parts for premium brands within 24 hours. Our technicians carry the diagnostic software for communicating systems from Daikin and other manufacturers, so we’re not guessing at error codes.
Common Furnace Repair Problems We See in Southlake Homes
- Failed ignition controls on propane furnaces after cold snaps. The 2021 Uri event exposed how many Southlake propane systems were never sized for sustained sub-20°F operation. We replace the failed component, then verify the propane delivery system can actually support the furnace at design conditions.
- Collapsing flex duct runs in 155°F attics. Southlake’s late-1990s luxury builds used 30-plus foot flex duct runs through brutally hot attic spaces. Those runs disconnect at fittings, restrict airflow, and make the furnace work harder while delivering less heat. The repair often reveals a full duct system replacement is needed.
- Heat pumps running auxiliary strip heat continuously due to low refrigerant charge. Homeowners call with a thermostat complaint, but the real problem is a slow leak that’s been dropping capacity for two seasons. The strips keep the house lukewarm while masking the underlying refrigerant loss.
- Undersized propane supplies starving main house furnaces when outbuilding mini-splits call for heat simultaneously. Rural Southlake properties with workshops or barns often pull heating from the same propane tank that was sized for the house alone. When both call at once, the main furnace loses pressure and locks out.
Pricing for Furnace Repair in Southlake, TX
We’re upfront about what furnace repair costs in Southlake because nobody likes a surprise bill. Most repairs fall between $150 and $700, with the final price depending on which component failed and how long it takes to access. An igniter replacement on a standard gas furnace typically runs $150 – $300, parts and labor included. A blower motor or gas valve replacement pushes toward the $500 – $700 range. Heat pump repairs follow the same scale.
| Service | Price Range in Southlake |
|---|---|
| Furnace Repair | $150 – $700 |
| Heat Pump Repair | $150 – $700 |
| Heating Repair | $150 – $700 |
| Tune-Up | $80 – $200 |
What affects the cost? Accessibility matters. A furnace in a cramped attic corner takes longer to open than one in a spacious utility room. The age of the system matters too. Parts for a 1998 Carrier are harder to find than parts for a 2018 Rheem. And the condition of the overall system matters. A furnace with a cracked heat exchanger may need full replacement, which we price separately so you can compare.
Every repair includes a written guarantee. This repair is guaranteed for 365 days. If it fails, we return at no charge. No argument, no additional fee. Call (984) 538-9003 for a free estimate.
We Also Serve Cities Near Southlake
Our Furnace Repair in Southlake crews also work in Colleyville, Grapevine, Flower Mound, and Roanoke. Each area has its own housing stock and heating challenges. Grapevine’s older homes differ from Southlake’s 1990s luxury builds. Flower Mound’s rural properties share some propane issues but have different wind exposure. We adjust our diagnostics to the actual house we’re standing in, not a generic checklist.
Serving Southlake, TX - Our Local Coverage Area
We’re based in the Southlake 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 Southlake
The heat pump should run as the primary heat source down to its balance point, typically 30 – 35°F for older Southlake systems, with the propane furnace as backup below that. If your thermostat is calling propane first, you’re spending more on fuel than necessary. We can reprogram the staging controls and verify the balance point against your actual equipment specs. Call (984) 538-9003 and we’ll check it.
Because the original flex duct in Southlake’s 1990s luxury homes is now 25-plus years old, run through attics that exceed 155°F in summer, and frequently collapsing or disconnecting at fittings. A furnace can be working perfectly while delivering half its heat into the attic. When we open a system and find crushed or disconnected duct, we show you with a camera and explain your options. Sometimes it’s a repair. Sometimes the duct is too far gone.
They need their own properly sized heating system, not an extension of the main house supply. We’ve seen too many workshops fed by the same propane tank that was sized for the house alone, starving the main furnace when both call simultaneously. A separate mini-split or dedicated propane furnace, with its own properly sized fuel supply, protects the main house and keeps the shop comfortable. We can size and install either.
Most furnace repairs in Southlake run $150 – $700, with igniters and capacitors at the lower end and heat exchangers or gas valves at the upper end. We give you a written price before any work starts. Every repair is guaranteed for 365 days. Call (984) 538-9003 for a free estimate.
It could be either, and we won’t know until we measure. Low refrigerant, a dirty outdoor coil, or a failed defrost control are repairable problems that reduce capacity. But many Southlake heat pumps were sized for our typical winters, not sustained sub-20°F events like Uri. If your system is properly charged and mechanically sound but still can’t reach setpoint, the issue is likely that the heat pump was never meant to carry the load alone in extreme cold. We can add propane backup or resize the system. Call (984) 538-9003 and we’ll sort it out.
Our tech was called to a 1998 custom home off Continental Boulevard after the homeowner reported the primary propane furnace locking out overnight while the upstairs heat pump couldn’t hold setpoint. We found a failed ignition control and a weak capacitor on the inducer, then rechecked the load calculation against the home’s exposed west wall with no wind shelter and recommended a propane backup stage for the heat pump. The repair restored heat the same visit, and we scheduled a follow-up to address the 30-foot flex duct runs collapsing in the 155°F attic.
Because Southlake sits at the Cross Timbers/Blackland Prairie transition where February ice events like 2021’s Uri drive sustained sub-20°F temperatures, heat pumps and propane furnaces here are routinely asked to run far below the balance point they were sized to, producing furnace repair calls that are really low-ambient capacity problems rather than broken equipment. This is the reality of heating in Southlake. We know it because we work here.
Ready to get your heat back? Call Brandt HVAC at (984) 538-9003. A live person answers 24/7, and we’ll send a Threshold Verified technician with a name, a photo, and a written price before any work begins. Every repair is backed by our 365-Day Done Right Promise.
Written by Devin Marlowe, Owner at Brandt HVAC, serving Southlake and the Dallas-Fort Worth area.