There are a couple of things you can do yourself for your heat that are small and easy to check before calling a local repair company. If your furnace keeps shutting off, check to see if you need to change your air filter. If that’s good, turn the thermostat fan to “on”, and place your hand over a supply vent. No or low airflow means your blower has an issue. After this, call a technician, as working with gas gets dangerous very quickly.