The questions this side of the metroplex asks, in the order it asks them
The downstairs is fine and the upstairs gives up every evening. What is actually happening? The two floors live different summers, and August grades the upstairs harder. Heat rises through the house all day, the roof bakes above the upstairs rooms, and the upstairs system works the longer, heavier shift of the two. When it starts losing, the cause sits in one of three places: the unit has been declining a step a season and the stacked weeks finally exposed it; the charge has drifted low, so it cools at partial strength from morning on and falls behind at the peak hour; or it was sized for the plan on paper and never truly held this upstairs in this heat. The dividing question is history. A system that held these rooms five summers back and cannot now has lost something specific. One that never held them was never equal to them, and that story has honest answers too, starting with a reading of what the house asks at six in the evening.
One wing of our house ignores its thermostat. The rest of the house is fine. Is the system broken? Probably not, and in a zoned house that symptom usually lives in the controls, not the equipment. Across the northern suburbs, big plans divide into zones, each with its own thermostat and a damper in the ductwork that opens and closes on command. When a damper motor tires, a zone board stops asking, or a thermostat goes dark, that wing drifts warm while the machine itself runs innocently for the other zones. The finding runs through the low-voltage half of the house: thermostat, board, damper, in that order, until the silent one names itself. Tell Marta which wing and whether its thermostat lights up. A lit thermostat and a dark one send the visit down different roads.
A hailstorm crossed our street and the AC has struggled since. Coincidence? In this region, often not. Hail folds the thin fins on an outdoor coil flat, and a folded coil cannot shed the heat the system collects indoors, so the unit runs longer, cools less, and wears its compressor doing it. The northeast suburbs keep the standing example: the storm that crossed Wylie in April 2016 folded coils across whole streets in one evening, and systems there have been paying for it by degrees ever since. Whether folded fins can be combed back or have folded past recovery is a finding made by looking at the coil, and it decides whether the storm left you a repair or a replacement conversation. When you call, give Marta the storm's date. In hail country, dates are diagnostic.
Our duct leaks keep reopening at the same joints. Why does the repair not hold? Because on this side of the metroplex, the ground under the house is a moving part. Dallas black clay swells when it is wet and shrinks when it is dry, and a slab foundation rides that movement by fractions across the seasons. Everything fastened to the slab rides it too, duct connections included, and a joint stressed at the same point every wet season and every dry one will open on schedule no matter how well it was sealed. The honest repair answers the movement: flexible connections at the stressed joints, slack where the run wants it, and a reading of which joints the soil has claimed. If a company has sealed the same joint twice without mentioning the clay, the third visit is already scheduled. Ask the soil question first.
Our furnace runs a few dozen nights a year. Can a system fail from doing almost nothing? Yes, and in this region that is the most common way furnaces fail. The mild weeks do quiet damage: a film on the flame sensor, a dried seal, a stuck contactor, an ignitor aging without ever being asked to glow. Calendar age and working age come apart on this map: a twelve-year-old furnace here may carry fewer working hours than a four-year-old furnace in a cold state, and still be dead on the first norther, killed by rest rather than wear. Read honestly, rest failures are usually the gentle repairs, and the first cold night is the worst possible night to discover one. One warm-up run on a mild October evening finds them inside an hour, in a week when a finding is still cheap.
Will a heat pump actually heat a Dallas house in winter? Yes, with one honest condition: they are at their best in exactly the winter this region usually gets, and they call on their backup in the winter it occasionally gets. A heat pump relocates heat rather than manufacturing it, and across an ordinary North Texas cold snap, northers in the 20s and 30s and mornings that thaw by afternoon, relocating is efficient work. In a freeze week, with the temperature parked in the teens for days, the auxiliary strips shoulder more of the load, and the bills show it. That is design, not failure. The surprise, when it comes, is the quiet version: a system living on its strips through ordinary weeks because the outdoor unit failed, presenting as an electric bill problem long before it presents as a heating problem. If your winter bill jumped while the house still heats, suspect the strips first, and tell us which month the bill moved: the month dates the failure.
Our system held 62 degrees through the whole February 2021 freeze. Is that a pass or a fail? How do I judge a system against it? Carefully: that week demanded more than residential equipment is designed to give. Equipment is sized for cold nights, not for an entire region sitting below freezing for days on end. A furnace or heat pump that held a house at 62 through that week may simply have been giving everything it had to give. The fairer test is an ordinary norther: one cold night, a hard drop, the winter weather this region actually gets most years. Answer that test and the workload record is sound, whatever 2021 felt like. Fail an ordinary norther, though, and the failure is a finding in any year. The freeze measures the week, not your system.
Our heat pump heats fine, but January's bill doubled. What gives? In a heat pump house, treat the bill as a diagnostic document. The likeliest story: the outdoor unit stopped pulling its weight, from a fault, a lost charge, or an emergency-heat setting somebody switched on in a cold snap and never switched back, and the strips have carried the house ever since. Strip heat works, and strip heat costs; that pairing is exactly how a house feels fine while its meter accelerates. First, look at the thermostat's mode. Looking costs nothing. Then call and name the month the bill moved. That month is when the failure started, and telling Marta that date shortens the diagnosis more than any symptom you could describe.
How fast can you get to us? The crew works one side of a metroplex in quadrant runs, which is what makes speed possible where it is possible. Close-in and north corridor calls are seen the same day most days, because those quadrants are where most of the work already is. East calls batch down I-30, and the far corners, McKinney at the north end and Rockwall at the east, run on named days each week. A house in genuine trouble, no cooling in stacked heat with someone fragile inside, no heat on a freeze night, goes to the front of its day whatever the run sheet says. That is not a bolted-on promise; it is what a three-person crew on one side of a metroplex can actually do, and Marta would rather name a real day than a hopeful hour.
What does a repair cost around Dallas? The planning ranges first. Most AC repairs land between $200 and $900; the capacitor, the commonest summer failure of all, typically runs $150 to $350. Most heat pump repairs land between $250 and $950; most furnace repairs land between $150 and $700. Every one of those numbers is a typical planning range for this market, nothing firmer. A price moves with the home, the equipment, and the access, and the contractor confirms your own figure before any work begins. That figure is born of your own finding, and it arrives beside an estimate that is free, hassle-free, and no-obligation. The tables live whole on the AC repair and heating repair pages.