Thermostat and Smart Controls in Greater Austin
Get expert help with thermostat and smart control setup, repair, and replacement today. Since 1977, McCullough Heating & Air Conditioning has delivered quality service with clear, upfront pricing. We serve the Greater Austin region, including Austin, Round Rock, and Cedar Park. Homeowners trust us for our 4.8 rating from 3,449 reviews and our customer-first approach. Ready for better comfort and control? Contact us to schedule service.
How our prices compare.
What can you expect to pay?
How customers feel about the bill, in their words.
Post-job survey · verified customers
Why Choose Us
Since 1977
Trusted local HVAC experts serving Central Texas homes since 1977
Transparent pricing
Upfront prices and clear communication on every job
Austin Energy partner
Registered contractor offering an Austin Energy-sponsored energy audit
Highly rated service
4.8 rating from 3,449 reviews
Smart control expertise
Experienced with Nest, Carrier Infinity, and other smart thermostats
What Our Customers Say
quality
“Very pleased with them repacing HVAC and thermostat. The workmen were on time.”
professionalism
“Alonzo was very thorough in checking out my thermostat and AC system.”
expertise
“He also figured out a puzzling issue with our thermostat.”
Del Valle
TX
Liberty Hill
TX
Elgin
TX
Barton Creek
TX
Dripping Springs
TX
Lakeway
TX
Spicewood
TX
Buda
TX
Austin
TX
Lago Vista
TX
Cedar Park
TX
Round Rock
TX
Webberville
TX
Jarrell
TX
Georgetown
TX
Weir
TX
Hutto
TX
Wells Branch
TX
Steiner Ranch
TX
Rollingwood
TX
Pflugerville
TX
West Lake Hills
TX
Manchaca
TX
Leander
TX
Cedar Creek
TX