Every year the same question comes up: when is the right time to turn on the AC in Texas? The answer is not a specific date — it depends on your home, your system, and what you do before that first run. Getting the timing right and doing a few things beforehand can prevent the rush of emergency calls that hit every HVAC company in April and May.
The Short Answer: Late March to Early April
In Central Texas, daytime temperatures start hitting 80°F consistently by late March. Most homeowners switch from heating to cooling somewhere between mid-March and mid-April. There is no harm in turning it on earlier if you are comfortable. The system does not care — it is designed to run.
The real issue is not when you turn it on. It is whether it works when you do.
What to Check Before the First Run
Change the air filter. If you have not changed it since last fall, it is overdue. A clean filter ensures proper airflow from the very first cooling cycle. Do not run the system on a dirty filter — it restricts airflow and can cause the evaporator coil to freeze.
Check the thermostat settings. Switch from HEAT to COOL mode. Set the temperature a few degrees below the current room temperature. Make sure the fan is set to AUTO, not ON. If you have a programmable thermostat, update the schedule for spring and summer patterns.
Inspect the outdoor unit. Over the winter, leaves, debris, and possibly even critter nests can accumulate around and inside the condenser. Clear everything within 2 feet of the unit. Look for visible damage to the fan blades or coil fins. Make sure the disconnect switch near the unit is in the ON position.
Test the system. Set the thermostat to cooling mode and lower it 5 degrees below room temp. Within a few minutes you should hear the outdoor unit start and feel cool air from the vents. Let it run for 15–20 minutes. If the air is not cooling, the outdoor unit is not running, or you hear unusual noises — schedule service before the summer rush.
Check the condensate drain. Your AC produces gallons of condensation during operation. This water drains through a PVC pipe, usually to an exterior wall or a floor drain. Pour a cup of water into the drain pan to verify it flows freely. A clogged condensate drain is one of the most common causes of AC shutdowns and water damage.
Why Spring Maintenance Matters
Here is the pattern we see every year: homeowners skip spring maintenance, turn on the AC when the first heat wave hits in May, discover it does not work, and call for emergency service. By then every HVAC company in the area is booked 3–5 days out, and emergency rates apply.
A spring tune-up costs $89–$150 and takes about an hour. A tech checks refrigerant levels, tests electrical components, cleans the coils, verifies the blower motor is operating correctly, and catches small problems before they become expensive failures. Kimco membership members get this included — call (737) 260-7255 to schedule your spring tune-up before the rush.
Signs Your System Needs Professional Help
After the first run, watch for these warning signs: the system runs constantly without reaching the set temperature, you hear grinding or squealing noises, the outdoor unit vibrates excessively, there is warm air blowing from some vents and cool from others, or you notice a spike in your electric bill. Any of these warrant a service call before summer arrives in full force.