There is a gadget called "5-2-1 Compressor Saver" which claims to protect your machinery and save electricity:
I sure would like it if some pros would look that over and tell us whether the claims are bogus. My thinking is if there really is a problem, and the solution is that easy, the manufacturers such as Trane are ethically obligated to include it in their products already. Am I off base?
Thanks in advance -- Pstu