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 ...

A draft hood used to effectively ventilate the area around older “gravity vent” furnaces. Because current furnaces lack this feature, the condition described below results in some unburned gas ...

Bob is a service technician who is well trained and nationally certified. However, he has sometimes suffered from the same confusion that all technicians occasionally do — the facts that he gathers ...