Firefighter-owned since 2018
Built on the same values James brought home from the firehouse
James Dillon started Steadfast AC Service on August 1, 2018, after years spent as a firefighter in the greater Houston area. The firehouse taught him three things that don't belong only on an emergency scene: show up when someone calls, be honest about what you find, and don't leave until the job is finished.
Those three things turned out to be exactly what most HVAC companies in Tomball were missing. James kept his firefighter's schedule, his habit of answering calls after hours, and his refusal to pad a service ticket. He built a company around those habits instead of around commission-based upsells.
Today his team includes Chris, Daniel, and Nate, all named by real customers in Google reviews, all trained to the same standard: get the diagnosis right, explain it plainly, and fix it completely before the van leaves the driveway. Steadfast has earned 312 Google reviews with a 5.0-star rating and a 100% recommendation record on Facebook, not by chasing reviews but by finishing jobs well.
The business is licensed by the Texas Department of Licensing and Regulation under #TACLA166258C and carries a satisfaction guarantee on every service call. If the work is not right, the team comes back and makes it right.
- Founded
- 2018
- Google rating
- 5.0
- Reviews
- 312
- FB recommend
- 100%


Our values
Show up. Be honest. Don't leave until it's done.
James didn't leave these values behind when he traded the firehouse for an HVAC van. They're the whole reason the company exists. Every technician on the team is held to the same standard, and every job gets the same commitment: if you called, someone shows up; if there's a problem, we tell you exactly what it is and what it costs to fix; if the fix didn't hold, we come back.
That's not a marketing line. Michael Duddy's review mentions that Chris didn't charge for a diagnostic visit when the problem turned out to be a thermostat the homeowner could replace themselves. Andrea Fabricius notes that James returned the next morning, unprompted, to confirm the repair was still holding. Erin Hennings got a call back on Father's Day. These are the things that happen when the firehouse discipline runs through a service company.
The team
James, Chris, Daniel and Nate
All four technicians have been named by customers in Google reviews. That's not common for an HVAC company, and it matters: these are real people your neighbors have already trusted. James handles a lot of service calls personally, including after-hours and weekend emergencies. Chris, Daniel, and Nate handle installs, repairs, and diagnostics with the same training and the same commitment to finishing the job.
The team installs York systems and works on all makes and models for repairs. Residential and commercial properties, 3-ton through 5-ton systems, preventive maintenance, indoor air quality, heating repair, and emergency service outside business hours.
Texas HVAC License: #TACLA166258C
Regulated by the Texas Department of Licensing and Regulation. Satisfaction guarantee on every service call.
Service area
Greater Tomball and northwest Houston
- Tomball
- Spring
- Cypress
- The Woodlands
- Gleannloch Farms
After-hours and emergency service available across all covered areas. Call (713) 303-4552 any time.


Ready to get started?
Honest HVAC work, backed by a firefighter's word
No surprises on the bill. No upsells you didn't ask for. Just the diagnosis, the fix, and a callback if anything changes. Call or send a message and James's team will be in touch.