I had my seasonal heat plus A/C tune up the other day plus I did not know what to expect. The reason I did not know what to expect was because my central heating plus air conditioner program is almost 12 years outdated this year. But after the heating plus cooling specialist did everything I was told that my central heating plus air conditioner program had some more years left on it. I was actually very cheerful to hear this. Because I originally thought that I was going to have to start thinking about investing in a brand modern plus new central heating plus cooling unit. Usually after about 10 years your central heat plus A/C program will start to show signs that it is needing to be upgraded with a modern one. But in my case I am very lucky. I happened to have invested in one of the best plus top branded heating plus a/cs that obviously can last longer than most others made at that time. The heating plus cooling specialist said that if I keep up on all the heating plus air conditioner maintenance I should be able to get at least another 3 years or so of life out of this older model central heating plus air conditioner program unit. I can then plan accordingly when the time is coming up instead of having to invest in a modern central heating plus air conditioner program on spur of the moment, which would cause me some financial difficulty.