As temperatures drop, your furnace becomes the unsung hero keeping your home warm and comfortable. But like any hardworking appliance, it can run into trouble, especially after months of sitting idle.

Check thermostat settings, filters, and fuel supply first when your furnace blows cold air. Call an HVAC technician for issues like sensor failures, clogged burners, or duct leaks. Skipping routine ...

Experts recommend turning on your furnace before freezing temperatures arrive to check for issues and help prevent major problems during winter. Signs your furnace may need replacement include being ...

man with open furnace unit attempting to fix it while reading directions from a tablet - Gregorbister/Getty Images Whether you're wondering if you accidentally switched on air conditioning mode to ...