How to Tell If a Furnace Fuse Is Blown (Homeowner Guide)
A furnace that suddenly stops running can be frustrating—especially when the thermostat is calling for heat but nothing happens. One of the most common causes of a completely unresponsive furnace is a blown fuse. The fuse protects the furnace’s low-voltage electrical components, and when a failure occurs, the system shuts down to prevent further damage. […]