5 Possible Reasons Why Your Electric Heater Isn't Working
5 Possible Reasons Why Your Electric Heater Isn't Working Realizing that your heating system isn't working can be tough, especially when it's cool outside. If you're wondering what's wrong with your system, consider one of these five possible causes. 1. You Haven't Been Changing Your Filter When you don't change your furnace air filter, you can cause clogs and can restrict air flow. It's critical to follow the instructions on your filters in regards to changing them -- some should be changed once a month, and some can last for three months or more.