I charge a fee of $150 to come and assess the issue. Then from there I am able to resolve the problem.
First I assess the issue and let the customer know what I need to do to resolve it. I let the customer know what the cost will be, and then I am able to fix the problem for them.
I went to a trade school to learn HVAC in a year long program. I received my EPA Universal Certification which allows me to work on any system that involves HVAC. I have been working in this field of work for the past 8 years.