I have been in my newly built house for 2 years. I have had a problem with my furnace since day one. The home builder's HVAC sub-contractor has not been able to fix the problem after 4 visits. I have a background in HVAC and am convinced that this is a design problem that is going to cost the builder a significant amount of money and they don't want to pay to have it repaired. I think they are waiting for me to give up the effort of having them repair the system properly. What would my first step be to pursue legal action for resolution? Thanks, Mike