I had been so busy the whole afternoon I barely had time to look at my phone. When I looked at my phone at around many in the night, I found many missed calls from my son, Evans. I immediately called him back. He told myself and others that he thought our Heating & Air Conditioning plan malfunctioned because the home was cold. It hit myself and others that I must have missed the alarm to readjust the temperature settings. I usually changed the settings when nobody was at lake home to save energy. Evans had even called the local a/c business asking for an cooling system worker to find out what was wrong with the cooling system. I told him there was no need for cooling system service & explained what was happening with the cooling system installation. It was about time I taught him basic things, such as how to reset the regulator. I was no cooling system representative, even though I knew a few things about improving indoor air conditions. I realized that he was already twelve & did not believe much about the Heating & Air Conditioning, & since it was just him & myself and others in our house, it was paramount that he l gained basic things. Other things, such as cooling system service, could be left for the a/c supplier. As for cooling system care, we would play our section in it because not everything about the Heating & Air Conditioning plan was up to the a/c business. I also made sure to confirm our scheduled a/c service. I would do not like to buy a new a/c plan simply because I failed to follow up on our annual cooling system care plan.