If you turn on the furnace but no heat comes out, there could be a blockage. Dust and grime obstruct airflow, and if the filter becomes too clogged, the heat exchanger can overheat and shut down prematurely, preventing your home from warming up. If the surface of the furnace filter is covered with impurities, you should clean it out, and if it is too damaged, consider replacing it. Aside from connections, improper thermostat settings can also confuse your furnace. Make sure your thermostat is set to ‘heat settings’ as raising the temperature of the heating isn’t enough.

There can be more than one reason for a heater not heating your home. A common cause is extremely dirty filters which can block the airflow leading to obstruction of pipes. Also, you may not realize that your heater may have an additional switch button for safety reasons, make sure it is ON. It is also possible that the electricity supply to the heater is cut off due to a faulty breaker. Do inspect your thermostat, if it is not set on ‘auto’ or ‘heat settings, or if the temperature is too low, then the heat won’t turn on.