Why Is My AC Not Blowing Cold Air? 9 Causes Texas Homeowners See Most
The blower is running, air is moving, and none of it is cold. Here is how a technician narrows that down, in the order they actually check.
In much of Texas this is a genuine question rather than a formality. Our winters are mild enough that a heat pump handles most heating days efficiently, and cold enough that the hard freezes still matter. Here is how to work out which makes sense for your home.
How each one actually works
A gas furnace burns fuel to create heat. Efficiency is expressed as AFUE, and a modern condensing furnace converts around 95 percent of the fuel energy into usable heat.
A heat pump does not create heat, it moves it. It is an air conditioner that can run backwards, extracting heat from outdoor air even when that air feels cold, and delivering it indoors. Because it moves heat rather than generating it, a heat pump can deliver more heat energy than the electrical energy it consumes. That is why heat pumps can exceed 100 percent apparent efficiency in a way combustion never can.
The Texas climate case for heat pumps
Heat pump efficiency falls as outdoor temperature drops, because there is less ambient heat to extract. In a Minnesota winter that is a serious limitation. In most of Texas, where a large share of heating hours occur between 35 and 60 degrees, a heat pump operates in its efficient range for the majority of the season.
Practical advantages:
- One system handles both heating and cooling, so you replace one piece of equipment instead of two.
- No gas line, no combustion, no flue, no carbon monoxide risk.
- No gas service charge if the home has no other gas appliances.
- Lower operating cost than electric resistance heat by a wide margin.
The case for a gas furnace
- Supply air is noticeably warmer, often 120 degrees or more against a heat pump's 90s. Some people strongly prefer that feel.
- Performance does not degrade in a hard freeze.
- Where natural gas rates are favorable relative to electricity, operating cost during genuinely cold weather can be lower.
- The home already has gas service and a working flue, reducing conversion cost.
Dual fuel: the option most people overlook
A dual-fuel or hybrid system pairs a heat pump with a gas furnace. The heat pump handles mild weather at high efficiency, and the control switches to the furnace below a set outdoor temperature where the furnace becomes the cheaper source.
For homes that already have gas and are replacing both the air conditioner and the furnace at once, this is frequently the best answer in Texas. You get heat pump efficiency across the bulk of the season and furnace capability during freezes. It costs more upfront than either option alone, and the switchover point has to be set correctly for your actual utility rates.
The auxiliary heat trap
Every heat pump has electric resistance backup, called auxiliary or emergency heat. It is expensive to run, several times the cost of the heat pump itself. Two things commonly go wrong:
First, a homeowner cranks the thermostat up by eight degrees on a cold morning. Most thermostats interpret a large jump as a demand for maximum output and energize the strips. Small adjustments avoid this.
Second, a fault in the heat pump leaves the system leaning on aux heat continuously. The house stays warm, so nothing seems wrong until the electric bill arrives. If your aux heat indicator is on constantly in 50-degree weather, something has failed. See heat pump repair.
Comparison at a glance
| Consideration | Heat pump | Gas furnace |
|---|---|---|
| Mild-weather operating cost | Lower | Higher |
| Hard-freeze performance | Needs aux heat support | Full capacity |
| Supply air temperature | Around 90–100°F | Around 120–140°F |
| Equipment count | One system, both seasons | Furnace plus separate AC |
| Combustion safety | None required | Flue and CO monitoring required |
| Typical lifespan in Texas | 12–16 years | 15–20 years |
How to decide
If you have no gas service, a heat pump is almost certainly the right choice. If you have gas and you are replacing both halves of the system, price a dual-fuel setup alongside the conventional options. If you have gas and only the furnace has failed, replacing like for like is usually the practical move.
Whichever direction you go, the sizing and ductwork matter more than the fuel type. Read how to size an air conditioner. For a quote, call (833) 435-6611 or find your Texas city.
Need a technician? Call (833) 435-6611 any hour of the day, or find your Texas city for local service details.
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