10/08/2026
Some furnace sounds are normal. Others are asking for help.
Normal is a click at startup, the blower spinning up, and a little ticking as the ductwork warms and expands. It happens in the first minute, and then it's done.
Not normal is anything that repeats every single cycle. Banging. Squealing. Rattling. A furnace that clicks over and over without ever lighting.
The tricky part is that most of these don't stop the system from working, so it's easy to live with them for weeks. Then it fails on the coldest night of the year, which is exactly when everyone else is calling too.
If your furnace has started making a sound it wasn't making last winter, call us at 719-494-7572 and tell us what you're hearing.