With older systems, regular maintenance is key. Change your filters, test the thermostat, and check for weird sounds or airflow issues. I had an older furnace that made it through three extra winters thanks to annual cleanings and sealing up duct leaks. Also, make sure your vents aren’t blocked by furniture. If you want a pro to give it a thorough checkup and catch small problems early, Astera Services https://www.asteraservice.com/ offers heating, cooling and appliance installing and repair and they’re great at helping older systems stay safe and functional during the cold season.