Dec 11, 2014
Some furnace noises are just normal mechanical sounds while other noises can mean mechanical malfunction. There are many online discussions about furnace noises because so many people experience the same thing in their Hallsville or Gladwater homes. The fact is, there are a variety of sources for furnace noise — some serious, some signaling the need for future attention, and some that are noises you may choose to live with. Learn how to distinguish what those furnace noises are and how seriously you need to take them.
Furnace noise comes in a variety of pops, bangs, whistles and whines, rattles and hums. While you should always get a professional to diagnose a noise properly, here’s a brief list of sounds your furnace may be making:
Troubleshooting these various noises and their causes is obviously for the expert, but it never hurts to have a better understanding of how your system works, and awareness as to what might go wrong.
Most of us grow familiar with the sounds the heating system makes during normal operation, so it can be disturbing when we notice something new. Sometimes, if you address the noise quickly, you can prevent further deterioration and a costly repair.
Let’s analyze some of the noises listed above, and the implications for the system once the problem arises.
Systems that haven’t been cleaned may also produce booms or pops when the heating comes on and as the duct walls expand.
Popping and booming may also be caused by delayed ignition due to dirt buildup on the burners. Test for this condition by having someone stand by the furnace while you call for heat at the thermostat. If you hear a boom within the furnace many seconds or even minutes after the adjustment to the thermostat, or if flame from the burners doesn’t appear for a good while, chances are you have a clogged burner. Make sure you get it cleaned, or you could risk a cracked heat exchanger.
If you have an older oil-powered furnace and you hear clicking, chances are its due to a worn fan. Soot buildup can also impede the performance of the fan. Worn bearings should be replaced immediately before the motor burns out, while a faulty gas valve should be fixed by the homeowner’s gas provider.
Pilot lights can wear out over time, and may need to be replaced. Don’t hesitate to call a professional when you have pilot light issues.
JD’s A/C is here to help you diagnose the reasons for any mysterious furnace noise and other HVAC issues you may have. We serve Longview and the surrounding area.