Warning signs your furnace needs repair before winter hits

Furnaces rarely fail without warning. Most give off signs weeks before they quit for good, but those signs are easy to write off as normal quirks of an older system. If you know what to watch for, you can get a repair scheduled before the first hard freeze instead of after.

Start with sound and smell. A furnace that bangs, rattles, or squeals when it kicks on is telling you something about its blower motor, ductwork, or a loose component. A burning smell that lingers past the first few minutes of a heating cycle, or any odor of gas, is not something to wait out. Short cycling, where the furnace turns on and off more often than it should, usually points to airflow problems, a failing thermostat, or a clogged filter restricting the system.

Uneven heat is another clue. If some rooms in your Aurora or Littleton home stay cold no matter how high you set the thermostat, the issue could be ductwork that has come loose, a blower that is not moving enough air, or a furnace that is undersized or losing efficiency with age. A jump in your gas bill without a change in usage often means the same thing: the unit is working harder to produce the same amount of heat.

None of these signs mean you need a new furnace right away. A lot of them are fixable with a tune-up, a part replacement, or an adjustment to airflow and ductwork. The bigger risk is ignoring them until the system stops working altogether, usually on the coldest night of the year. If you are noticing any of these signs in your Denver, Lakewood, or Littleton home, it is worth having a technician take a look before winter settles in for good.