Key Points 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 ...
Pay attention to furnace smells. A metallic or burning odor could mean overheated electrical components. A musty smell ...
What is the best temperature to set thermostat in winter? Here's what experts say and recommend temp to keep warm at and save money on heat.
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