Contact Us
Highland Park is among the most prestigious residential communities in Texas, and its homes reflect that standing in every detail. The town developed in earnest through the 1920s and 1930s, and the architectural legacy of that era remains highly visible: Georgian and Colonial Revival estates, Mediterranean villas, and Tudor manor homes on wide, tree-canopied lots that have been maintained and in many cases expanded across generations of ownership. Alongside those historic properties, a sustained wave of teardown and new construction over the past two decades has introduced contemporary custom builds with mechanical systems of an entirely different generation, multi-zone configurations, modulating furnaces, communicating controls, and smart home integration that would be unrecognizable to the original residents. Within a single block of Euclid Avenue or Armstrong Parkway, a technician might service a home from 1928 and a home completed in 2019, and the gap between their heating systems is as wide as the gap between their years of construction.
Ellis AC & Furnace Repair has served the Park Cities area since 1975. We are family owned, and our technicians bring the technical range to work accurately across that full spectrum of equipment. When your furnace needs attention in Highland Park, you will receive a thorough diagnostic, an honest assessment, and a clear written proposal before any work begins.
our services
- AC & Furnace Air Filter Replacement
- AC Capacitor Replacement
- AC Coil Cleaning
- AC Compressor Repair
- AC Installation & Replacement
- AC Maintenance
- AC Repair
- AC Tune Up
- Dehumidifier Installation & Repair
- Ductless Mini Split Repair
- Emergency HVAC Repair
- Freon Recharge
- Furnace Installation & Replacement
- Furnace Maintenance
- Furnace Repair
- Heat Pump Installation & Replacement
- Heat Pump Maintenance
- Heat Pump Repair
- HVAC Ductwork Repair
- HVAC Inspection
- HVAC Maintenance
- HVAC Repair
- Indoor Air Quality Solutions
- Whole Home Air Purifier Installation
Furnace Warning Signs Worth Acting On Before Winter Sets In
In Highland Park, where homes are maintained to an exceptionally high standard and where the cost of deferred maintenance compounds quickly on properties of significant value, catching a furnace problem early is both a practical and financial priority. The signs below are worth a service call regardless of whether the system appeared to be functioning normally at the end of last heating season.
- The furnace runs through complete cycles but the home never fully reaches the thermostat setting, with temperatures plateauing several degrees short of the setpoint even after extended operation.
- The system shuts off before satisfying the thermostat call and restarts a short time later, cycling in a repetitive pattern that suggests a safety limit is being tripped before the cycle completes.
- A new sound appears this season during startup or operation, whether a sharp bang at burner ignition, a metallic rattling from the air handler, or an intermittent grinding that intensifies under load.
- One zone or wing of the home stays persistently cooler than the rest during cold weather, even with the zone thermostat calling for heat and the system appearing to respond.
- An odor during furnace operation that has a chemical, metallic, or combustion quality rather than the brief seasonal dustiness typical of a system starting up after months of dormancy.
- Heating costs have risen from one winter to the next in a way that does not correspond to any change in thermostat programming, occupancy, or usage patterns.
- The system does not respond when the thermostat calls for heat, or the ignition sequence attempts repeatedly without producing a flame that sustains through the startup cycle.
In a home where every other system is maintained proactively, the furnace deserves the same standard of attention. A developing problem that is caught in October costs far less to resolve than one that reaches failure on the coldest night of the year.
The Furnace Challenges That Define Highland Park's Housing Stock
No DFW community presents a wider span of residential HVAC conditions within such a small geographic area than Highland Park. The town covers barely two square miles, yet within that footprint, our technicians regularly encounter furnace systems that span nearly a century of heating technology, from mid-twentieth century conversions in homes where the original radiant or gravity heating was replaced with forced air during a post-war renovation, to state-of-the-art modulating systems installed last year in a newly completed custom build. That breadth demands genuine technical range, not just familiarity with a standard residential equipment lineup. Highland Park also sits on the Blackland Prairie clay formation that runs through central Dallas County, and the expansive soil beneath the town generates persistent foundation movement that stresses duct connections in older homes in ways that compound over decades without ever fully stopping. The failure patterns our technicians encounter most consistently in Highland Park reflect all of those conditions.
- Retrofitted duct systems in historic homes where forced-air heating was introduced into structures that were never designed for it, producing airflow configurations with chronic return air deficiencies, oversized supply runs, and pressure imbalances that no amount of equipment replacement has ever fully corrected.
- Modulating furnace and communicating thermostat compatibility failures in recently completed custom builds where sophisticated control systems have developed calibration or wiring issues after their first several seasons of operation.
- Heat exchanger fatigue in mid-generation systems from the 1990s and early 2000s that replaced original equipment but are now themselves approaching or beyond their designed service window in homes where extended runtime from above-average heat loss has accelerated wear.
- Duct leakage at joints and transitions in older properties where original mastic sealing has degraded across decades of thermal cycling and Blackland Prairie soil movement has progressively stressed duct connections throughout the system.
- ECM variable-speed blower motor failures in high-efficiency systems installed during the new construction and renovation wave of the 2000s and 2010s, where motor technology from that era is now encountering the age-related failures characteristic of its generation.
- Combustion venting complications in older homes where original chimney-based or early metal flue configurations have corroded, separated, or been partially compromised during renovation work over the decades.
Servicing the full range of heating systems found in Highland Park is not a task for a company with a narrow equipment specialty or a standardized diagnostic checklist. It requires genuine breadth, genuine experience, and the willingness to approach each home on its own terms.
What a Furnace Repair Visit From Ellis Looks Like in Highland Park
A service call in Highland Park demands the same level of preparation and professionalism that every other contractor working in this community is expected to bring. We are aware of that standard, and we hold ourselves to it on every visit. Our technicians arrive on time, work carefully in homes where the interiors reflect significant investment, and conduct every inspection with the thoroughness the equipment and the property deserve.
For standard forced-air systems, our inspection covers the heat exchanger and secondary exchanger integrity, burner and ignition assembly, flame sensor, draft inducer, blower motor and capacitor, filter and return air pathway, flue and combustion venting, thermostat and control board, and accessible ductwork at the unit and nearby transitions. For high-efficiency modulating systems, we add modulating valve operation verification, ECM motor assessment, communicating thermostat calibration, and condensate system evaluation. For zoned configurations, we test every damper actuator, verify zone board communication across all thermostats, and assess bypass damper condition and operation. We measure static pressure and temperature rise under load before finalizing any findings. All findings are documented, explained in plain language, and presented in a written estimate before any work begins. Our trucks carry components for the most common repairs across all system types, and the large majority of Highland Park service calls are completed on the first visit.
A January Call on Miramar Avenue
Miramar Avenue is one of Highland Park’s most storied residential streets, lined with large estate homes built primarily in the 1930s and 1940s that have been meticulously maintained and selectively updated across multiple generations of ownership. The mechanical systems in those homes reflect that ownership history in layers: original structural configurations that have never changed, duct systems added during mid-century renovations, and furnaces that have been replaced once or twice since but remain connected to infrastructure that predates them by decades. On a cold afternoon in January, a homeowner named William called after noticing that his furnace had been running continuously for most of the previous day without warming the home’s upper level past 62 degrees despite the thermostat being set to 70.
Our technician arrived and conducted a full system evaluation. He found that the return air pathway serving the upper level supply system had been significantly reduced by a renovation completed several years earlier that had enclosed a hallway return air grille behind new millwork without providing an equivalent replacement path. The furnace was drawing the volume of return air the upper level system required through a single undersized grille in a first-floor location, which was forcing the heat exchanger to operate at elevated temperatures and trip the high-limit switch repeatedly before completing full heating cycles upstairs. He also found that the duct connection at the main upper-level supply plenum had developed a gap at one of the transition fittings, routing a portion of the heated air into the attic space rather than into the second floor rooms. The technician documented both findings thoroughly, explained the causal relationship between the return air restriction and the furnace’s repeated high-limit trips, and presented William with a written estimate covering the duct repair and a recommendation to engage a contractor to restore the return air pathway to its original capacity. William said no technician in the previous three service visits to the home had connected the renovation work to the heating performance problems he had been experiencing for years.
Why Highland Park Homeowners Choose Ellis AC & Furnace Repair
Highland Park homeowners bring a level of discernment to every contractor relationship that reflects both the value of their properties and years of experience working with professionals across every trade. They know what competence looks like, they recognize when a diagnosis is incomplete, and they remember the companies that got it right and the ones that did not. Ellis AC & Furnace Repair has been earning the right kind of reputation in the Park Cities area since 1975, and the standard we hold ourselves to on every service call is the reason homeowners here continue to call us and continue to refer us to their neighbors.
The qualities Highland Park homeowners consistently identify as most important in an HVAC company reflect exactly what we have built our reputation on across more than five decades of service in this region.
- Technicians who average more than 10 years with the company and bring the technical range to work accurately on historic retrofitted systems, mid-generation equipment, and the most sophisticated modern modulating and communicating systems in the market today.
- A diagnostic process that looks at the full system in its full context, including the infrastructure conditions surrounding the equipment, because in a historic home the two are almost never independent of each other.
- Professionalism and care inside the home that reflects the standard of the property, from how technicians handle their equipment to how they document and communicate their findings.
- Fully stocked service trucks that carry components for the most common repairs across all furnace types and configurations, so the majority of jobs are completed without a return visit.
- Written estimates with itemized detail before work begins, with no additions after the fact and no pressure to make decisions before the homeowner is prepared to do so.
- Around-the-clock emergency furnace repair availability for Park Cities homeowners when a heating failure cannot be deferred to the next available appointment slot.
- A family-owned company with a BBB A+ Rating, NATE certification, and TDLR licensing that has operated independently in the Dallas area for over 50 years, never acquired, never franchised, and never willing to compromise the standards that built this company’s reputation.
Highland Park is one of the most demanding service environments in the Dallas market, and we have been meeting that standard since long before most of its current residents arrived. That history matters to us, and it shows in how we approach every call.