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.
A Texas house without air conditioning heats up faster than most people expect. Interior temperatures typically climb into the mid-80s within two to three hours on a 100-degree afternoon, and the slab and walls store that heat well into the night. Here is what to do while the truck is on its way.
First: call, then act
Get on the schedule before you start troubleshooting. Dispatch queues fill fast during heat waves, and moving up the list later is harder than getting on it early. Call (833) 435-6611. Describe the situation accurately, especially if there is an infant, an older adult, or anyone with a respiratory or cardiac condition in the home. That affects how the call is prioritized.
Shut the system down if any of these apply
- There is ice on the copper lines or the indoor coil.
- Water is dripping from the ceiling or pooling near the air handler.
- You smell burning, hot plastic, or electrical insulation.
- The breaker trips every time the system starts.
- The outdoor unit is making a grinding or screeching noise.
In those cases, switch the system off at the thermostat and the breaker. Continuing to run it converts a moderate repair into a compressor replacement or water damage. If there is ice, setting the fan to ON while cooling is OFF will help it thaw.
Buying yourself degrees while you wait
Close the west side down
Afternoon sun through west-facing windows is the single largest heat load in most Texas homes. Close blinds, curtains, and shades on the west and south sides. If you have cardboard or foam board, putting it in the worst windows genuinely helps.
Do not open the windows during the day
Once the outdoor temperature exceeds the indoor temperature, opening windows makes it worse. Wait until evening when outdoor temperature drops below indoor temperature, then open up and use fans to flush hot air out.
Use fans correctly
Fans cool people, not rooms. A ceiling fan running in an empty room only adds heat from the motor. Point box fans at occupants. In the evening, put one fan in a window blowing out and another blowing in on the opposite side of the house to create cross-flow.
Eliminate internal heat sources
Do not run the oven, the dryer, or the dishwasher's heated dry cycle. Turn off unnecessary lights and electronics. Cook outside or eat cold food. These sound minor individually and add up to a few real degrees.
Consolidate into one room
Pick the coolest room in the house, usually a north-facing interior room on the ground floor, close it off, and put a window unit or portable AC there if you have one. Cooling one room is achievable when cooling the whole house is not.
Manage body temperature directly
Cool showers, wet towels on the neck and wrists, and steady water intake do more for how you feel than anything you can do to the building. Watch for heat exhaustion symptoms: dizziness, nausea, headache, confusion, or stopping sweating. Those mean it is time to leave the house for somewhere air conditioned.
When to leave
If indoor temperatures are climbing past the low 90s and you have vulnerable household members, do not wait it out. Public libraries, malls, and community cooling centers exist for this. Pets are at risk too, and they cannot tell you when they are in trouble.
What to have ready for the technician
- The brand and model of your outdoor unit, from the data plate.
- Approximate age of the system.
- What you were doing when it failed and what you noticed first.
- Any recent repairs and who performed them.
- Clear access to the attic or closet where the air handler sits.
That information can shave real time off the diagnostic. More on how we handle after-hours calls at emergency HVAC repair, and you can 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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