Hey guys, I have an Enviro EF3-bi that would be over 10 years old now, since new. Lately, there seems to be a louder whining, or grinding noise coming from the stove. I have a feeling that it's the exhaust blower motor. If I turn off the dial-a-fire, the noise is still there, so it's not the auger motor. The main heat blower motor is running fine, and I oil that every season. I read that the bearings are sealed on the exhaust blower, so that motor can't be oiled. The noise comes and goes, will start up with the noise and sometimes go away, then start again later the same day. This morning, it's been making the noise since startup. Do you think that the exhaust motor is where this would be coming from? Worried now, what happens if the motor dies...will by house fill with smoke, or will it still exhaust naturally until I can get it fixed? Any help or ideas would be appreciated. Thx