The majority of natural gas furnaces are really dependable. Do you know the signs of problems? A furnace might not deliver heating or won’t generate ample heating. A pilot light might go out continuously or perhaps won’t light. A thermocouple could be defective. The pilot might light and yet never fire up the burners. Your furnace might be noisy. There are several routine maintenance items, plus some minor maintenance tasks that one could make in order to reduce failures of your main gas furnace. Devote some time monthly to look at the furnace filter and thoroughly clean or change it out when necessary.