Why Your Furnace is Blowing Cold Air: It Might Not Be Broken

There is nothing worse than waking up to cold air coming from your vents. Before you panic and call for a replacement, know that many "no heat" calls are caused by minor, repairable issues like a dirty flame sensor, a clogged filter, or a safety limit switch. We explain the common causes of furnace failure and how our expert diagnostics pinpoint the fix without replacing the unit.