HVAC Repair in Round Rock, TX
Homes here need heat from November through March and cooling from April through October. If your system quits, tell us what it's doing and a licensed contractor who covers Williamson County will get in touch.
Tell us about the job
It takes about a minute.
Your system works all year in Williamson County
There is no real off season here. Your furnace runs November through March, then the AC takes over from April through October. Neither one gets much time to sit idle and cool down.
Summer afternoons averaging 95°F push the compressor hard for seven months straight. That kind of steady load wears on it in a way shorter summers do not. Winter nights averaging 40°F are milder, but half the homes here heat with electric systems, and storms are the real risk. Williamson County has seen 10 winter storms and 58 damaging wind events over the past ten years, and statewide, a third of households lost power for at least a day in 2024. When the power drops and comes back, most systems restart on their own. If yours does not turn back on, that is worth a call.
- 5 months
- November through March, your system heats
- 7 months
- April through October, it cools
- 40°F
- the average winter night it heats against
- 95°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Texas requires HVAC contractors to hold a state license.
The Texas Department of Licensing and Regulation tests HVAC contractors before it licenses them, and it keeps a record of who holds one. That license belongs to the contractor, not to any single job, so the person shows up already vetted rather than being checked one repair at a time.
For a repair like this, that license is what stands behind the work. Heating and cooling repair can mean opening a gas line or handling refrigerant, and the contractor doing that in your home is the same license holder the state has on record, accountable to them if the work is wrong.
Source: Texas Department of Licensing and Regulation
- Why is my heat not working?
- Start with the thermostat. Make sure it is set to heat, not cool, and that the set temperature is above the room temperature. If the thermostat looks right, check the breaker for the furnace or air handler, since a tripped breaker will shut the whole system down. Half of homes here heat with electricity, so if the outage is at the breaker or the power itself, the heat stops with it. If power and settings check out and you still get no heat, the igniter or flame sensor may need a contractor's attention.
- Why is my system running but not cooling the house?
- If air is moving but it is not cold, check the air filter first. A filter clogged with dust blocks airflow across the coil, and when that happens the coil can freeze and stop cooling the air at all. Next check the outdoor unit. If the fan outside is not spinning or the unit is caked in leaves and debris, it cannot release the heat it is pulling from the house. Summer afternoons here reach 95°F, so a system fighting a dirty filter or a blocked outdoor unit will fall behind fast and may need a contractor to look at the refrigerant charge or the coil itself.
- What can I check before calling for HVAC repair?
- Check the thermostat settings, the batteries in it if it uses them, and the breaker for the indoor and outdoor units. Check the air filter next and replace it if it is visibly dirty, since a blocked filter causes problems that look like bigger failures. If the outdoor unit is not running, look for a tripped breaker or a disconnect switch that may have been bumped. Texas sees frequent storms, including 58 damaging wind events here over the past ten years, so if the power was recently out, give the system a few minutes to reset before deciding something is broken. A contractor licensed by the Texas Department of Licensing and Regulation can price and diagnose anything beyond this.