My Heating and A/C system has lasted me a long time because I take real great care of it, everything you study online that they say to do, I do it. Every Spring I get my cooling system tuned up. I have the Heating and A/C business check the coils, lubricate the motor belt and dust the fan blades. I also do my own A/C cleaning throughout the Summer to keep it fresh and laboring well. I only run the A/C at night since I am outside during the day. I baby it so it will keep on running. In the fall I then call for heating service. I have the blower oiled, the heat exchanger checked and the dust wiped out of my system. During the year I change my furnace filter properly and I constantly am listening for noise. The heating system is used sparingly. I don’t set my temperature control to unrealistic temperatures and make it work all day. I set the temperature control as low as I can sit it and try to let my gas furnace take breaks. Anytime a Heating and A/C business recommends a part being upgraded, I upgrade it. I do what I can to ensure the Heating and A/C keeps on running. It was a super expensive system to buy and have installed in my home. Maintaining a Heating and A/C device is appreciate cleaning your teeth, going to the dentist or laboring out. Everything in life needs a little maintenance in order to work well. My Heating and A/C system is hopefully going to last another 5 years because of how great I treat it.