I grew up with the attitude that if it's mechanical and not working correctly, I was going to dive in find out what the problem was and fix it, whether it was my bicycle, then my motorcycle, then my car and now my home and whatever it needs to provide my family a place of dependable comfort. For the last 30 years in the HVAC Business, this same attitude has been with me in my own HVAC business. If it's HVAC and not working right, I'm going to identify the problem and then fix it so that your system will provide your family with a dependable and comfortable home to live in.
Missouri does not issue a statewide electrical, plumbing, handyman and general contractor license and delegates licensing and permitting process to the local permitting authority of the city the contractor works in. So a contractor you consider to hire must be in compliance with any local jurisdiction regulations.