Another company installed a brand new heating and air conditioning unit about eight or nine years ago, and I never thought it was working right. Finally, we had Texas Air Authorities, Inc. come out to look at it, They found several things that had been installed incorrectly, and one part that had burned out. They explained all this to us as they worked, and now everything is fine. We have cold air, and since they replaced the variable speed blower, our electric bill has gone down an average of $30 per month! Texas Air Authorities did an outstanding job!