WNY wrote:you might have to unbolt it and put some nylon washers or a flat gasket around the opening and make sure its tight. usually between the flange and the stove it can sometimes rattle.
Also check the squirrel cage itself, the inlet screen (if it has one) and the set screw on the squirrel cage blower itself, sometimes they come loose.
Have you lubricated the motor when you had it off?
No inlet screen so I don't think that is an issue. Everything seems really tight, the noise seems to be coming from the actual motor but i will make sure the blower is tight against the stove. If a gasket fixes it that would be great.
The only time the motor has been off is when it was shipped to me and I assembled the stove. It is only 4 months old and this is the first time it has run for any amount of time. so it shouldn't need any lubrication, at least i wouldn't think it should. Thanks for the help.