AC unit is old and might be on its last leg. Not working again. Any trustworthy companies out there?

Seven years ago I used Climate Express out of New Braunfels. I was pretty happy with them. I have them doing annuals on my system right now.

https://www.climateexpressair.com/

We have used Wilks HVAC for 10yrs or so and have been very pleased with their service

https://wilksair.com/

Thanks!