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Blog Title: gas furnace wobbles and shakes

Main Que: My furnace wobbles and shakes sometimes. What could be the problem?

  • Category:
  • Query By: KENNETH MARTIN (Yulan, ID)
  • Date: 11/15/2015

Answer: Most of the time wobbling inside the furnace is caused by the blower wheel being out of balance. Most of the time a piece of something (filter, furnace insulation, dirt) is sucked into the blower wheel (squirrel cage) and causes it to become off balance and wobble. I would recommend turning off the power to the furnace, taking the blower door off and inspecting the blower wheel with a flash light and a mirror. Sometimes the blower wheel balance weights can fall off and this will also cause so blower wheel wobble. Many times it is hard finding the weights and where they should be place if they have fallen off. It is almost better to replace the whole blower wheel if the weights have fallen off. The weights usually only one or two are little pieces of U shaped metal that friction fit on to the blower wheel fins. A motor with the bearings going out can also cause wobble, but most of the time it is the blower wheel out of balance that causes wobble. I hope you have a blessed day and week.

  • Replied By: ALLEN GARZA (Ware, FL)
  • Replied Date: 11/15/2015