Quadrafire cb 1200 smoke from exhaust outside

Have a 3 year old quad cb 1200 freestanding. Upon coming back from vacation the stove is constantly smoking from the exhaust outside. Stove seems to run fine, maybe making more ash than normal, but it's smoking out the exhaust all the time. Any help appreciated.

To add, I've cleaned the whole stove twice, brushed the 3" vent pipe twice. Stove has an outside air kit and that is clear and unobstructed.

FIXED, Combustion exhaust fan replaced with aftermarket improved version. No smoke and about 300% quieter.

Was the old blower noisy?
That is a sign it is on the way out.