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Having problems with the Combustion Air Inducer it vibrates when it starts up in my Lennox G43 furnace.

Post created: 2014-04-16 Type of Equipment: Furnace Views: 206

This question was created on the page: https://www.furnacecompare.com/furnaces/lennox/g43.html.

I am told this part is not available as a repair part and needs to be replaced as a unit with the furnace.


On 2014-04-16 TomoTech wrote:

The "Induced Draft Motor" is what you are having problems with.

This small motor is attached to a squirrel cage within a shell and mounted to the furnace heat exchanger. This entire I.D. Motor assembly can be replaced by a licensed contractor.

The vibrations may be the result of an out of balanced squirrel cage, or foreign objects in the venting from hack intallers.

I recently found a seized I.d. motor that failed from having 4 mice crammed between the cage and the furnace.


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