Your heater is incredibly valuable when it gets cold outside. It keeps your house toasty, warm, and comfortable. The last thing you want to do after commuting in the cold weather outside is to walk into a chilly house. Regular maintenance such as changing the air filters, checking the pilot light, and having the ducts c leaned periodically can help your heater to run smoothly. You also need to be aware of the warning signs that there is something wrong with your heater.