SAN ANTONIO GUIDE
Cooling help for San Antonio houses
The attic runs hotter than the rooms.
A condenser that has run since noon, a clammy hallway, and a drain pan over the ceiling are the usual summer story. Write down the symptom, where the air handler sits, and who is home before you approve a repair.
What is happening? ↓Concept diagram only. Equipment layouts vary by house.
START WITH THE SYMPTOM
What are you noticing?
The system runs and the rooms stay warm
Attic heat, a frozen coil, and a condenser that will not catch up.
No cooling and the house is getting dangerous
Who should leave, and what not to bypass while you wait.
Heat will not start after sitting idle
A gas furnace or heat strips on a rare cold morning.
The setpoint is close and the air feels wet
Long runtimes, short cycles, and condensate that never leaves.
BEFORE YOU CALL
Write the symptom before you approve the work.
Mode, attic access, and who is home. Notes never leave the browser.
Write my service notes →- What is it doing?Warm air, no air, ice, a stain, or no heat at all.
- Where is the equipment?Attic handler, closet, outdoor condenser, or furnace.
- Who is in the house?Older adults, infants, or anyone who already feels ill.
ALL GUIDES
Fifteen guides for San Antonio houses.
Written for a long cooling season, attic equipment, and winters that are mild until they are not. Start with the symptom you actually have.
A cooling visit, attic to condenser
Runtime, drainage, and the outdoor unit during a long San Antonio cooling season.
Read the guide →No heat after months of cooling
Gas ignition, electric heat strips, and equipment that sat idle until a cold night.
Read the guide →Running, but the house will not cool
Attic heat, a frozen coil, a full drain pan, and airflow, told apart.
Read the guide →One machine for cooling and light heat
Defrost, auxiliary strips, and emergency heat in a mild winter climate.
Read the guide →Factors, not a dollar figure
Access, refrigerant, timing, parts, and permits, with no prices attached.
Read the guide →Repair, or stop and replace
Repeated leaks, unavailable parts, and a single failed component, told apart.
Read the guide →No cooling on a dangerous afternoon
Who should leave, what to check, and what not to bypass while you wait.
Read the guide →Spring start-up, then a winter note
Condensate, the outdoor coil, and a heat test before the rare freeze.
Read the guide →Combustion risk when heat is uncommon
Alarms, gas odor, the water heater, and a furnace that sat idle.
Read the guide →Settings that mimic a dead system
Mode, schedule, batteries, and the faults a new thermostat will not fix.
Read the guide →Permits, inspections, and the license
City and county offices, and why a state license is not the same paper.
Read the guide →Questions before the hatch opens
License, scope, refrigerant, and the permit, asked before the work starts.
Read the guide →Homeowner checks versus closed cabinets
Filters and debris on one side. Refrigerant, gas, and safety switches on the other.
Read the guide →Charge, leaks, and the nameplate
Why a top-off is not maintenance, and what a technician should measure first.
Read the guide →Clammy rooms and the drain
Long runtimes, short cycles, and the condensate that has to leave the attic.
Read the guide →WHY A SAN ANTONIO GUIDE
A long cooling season, attic equipment, and a short winter.
San Antonio’s humid subtropical climate asks air conditioners to run for months, often with the air handler in the attic, where the temperature sits well above the living space. Condensate from those hours has to leave through a drain that clogs. Winters are usually mild, so heat pumps carry a lot of the light heating, and gas furnaces sit idle until a cold night. Hard freezes are uncommon and still real, including the February 2021 freeze. Limestone is the ground under the pads. King William, Monte Vista, Southtown, the Pearl area, and Stone Oak do not share one equipment closet. Alamo Heights is its own city. CPS Energy is the city-owned electric and gas utility. The Texas Department of Licensing and Regulation licenses air conditioning and refrigeration contractors.
Who writes this and how →QUICK ANSWERS
Common San Antonio questions
Is San Antonio HVAC Guide a repair company?
No. The site explains cooling failures, idle heat, condensate, and what to ask before someone opens the system. It does not send technicians, quote a price, or rank contractors. When a page shows a phone box, that line is a referral, not a dispatch desk here. Look up the company with the state licensing board and get a written scope before work starts in the attic.
Why do these guides talk so much about the attic?
Attic air handlers are a common South Texas arrangement, and that space gets much hotter than the rooms during a long cooling season. The drain pan, the filter, and the coil are up there, so a no-cool complaint often starts above the ceiling. Basement furnaces are not the local layout. Access changes the visit, from a Stone Oak platform to a tight closet in an older house.
Who licenses heating and cooling contractors in Texas?
The Texas Department of Licensing and Regulation licenses air conditioning and refrigeration contractors, and you can look a company up on the state page. A license is not a local permit. Inside San Antonio, ask the City of San Antonio Development Services Department whether the scope needs one. Outside the city, start with Bexar County. Alamo Heights is a separate city, so confirm the office instead of assuming the San Antonio desk.
What if the cooling is out and someone already feels ill?
Older adults, infants, and anyone who already feels ill should not wait in a dangerously hot house. Get them to a cooler place, and call emergency services if someone is in distress. This site does not give medical advice beyond that. A same-day checklist for the equipment is not a reason to keep vulnerable people inside while you compare estimates.
Where should I get the gas emergency number?
From the CPS Energy bill. CPS Energy is the city-owned electric and gas utility. If you smell gas, leave the building, do not flip switches, and from outside call the emergency number printed on that bill. Do not take a number from an article. A carbon monoxide alarm, or symptoms that ease outdoors, means get everyone outside and call emergency services rather than searching the house.