Is your furnace sounding a little off? Rattling, whistling or banging can be signs of a number of problems. Here’s how to read the sounds your furnace is making.
Whistling coming from your furnace can mean a few things. First, there may be gaps in your ducts. Second, your filter may be clogged, especially if the whistling sound is new. Pull out the filter to see if the whistling stops, and if it’s clogged and stopping airflow, replace it or clean it. The third reason for whistling is that your ducts are too small, and you may need larger ones. When trying to identify the problem, see if you can determine where exactly the whistling sound is coming from.
Rattling or Vibrating
If your furnace is rattling, there are a couple of things homeowners can do to fix it, as this is more of an annoyance than a sign of real issues. See if any of your ducts are loose and if they are, try to secure them better. If the furnace itself is rattling, try putting rubber or cork pads under the furnace. If these don’t work or if you believe it’s coming from the furnace’s motor, call your technician.
Does your furnace bang when you turn it on? It could be that your duct work is flexing when the pressure changes, or it could be a small explosion called an ignition roll out. If you’re concerned that this is the problem, call your HVAC technician immediately and turn your furnace off in the meantime.
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