Why is my HVAC motor making a loud noise?

Possible causes include: 

• Blower motor has an issue
  • The motor could be seizing up causing a humming sound or other loud noise. This could also create a foul smell.
  • The blower wheel might be coming apart. This could cause a loud noise or a ratteling sound.
• Draft inducer motor may be failing
  • Your draft inducer blows the flue gas out of your furnace. It has a motor and blower wheel that could be failing. This would certainly cause a humming or screeching noise.
• Ductwork popping and/or expanding
  • When your furnace blower starts up, it pressurizes your ductwork. That could cause a pooping sound in the ductwork. It will also pop when the motor shuts down.
• Dirty air filter
  • A dirty air filter will make the blower motor work harder to pull the air through the system. This may cuase a windy/ air noise.
• Poor combustion of gas
  • When a furnace doesn’t ignite well, it can make a boom sound. This happens when burners are dirty and need cleaning.

Need more help with HVAC motors? Call us in Norton, OH.