If your pellet stove ever shuts down and the #2 (AS) light blinks, this is an indication that there is a problem with the airflow in the unit. Most of the time this is related to cleaning, and properly cleaning your stove and exhaust pipe will correct this situation in most cases.
Be sure to follow all of the directions in your owner's manual for cleaning your pellet stove. Pay special attention to the ash clean-out doors during your cleaning. Take some extra time and care to get all the way inside of the doors to the left and right, and all the way up inside of these doors as far as you can go. In almost all cases this is the source of the problem. Remember that you should clean out these doors at least once every ton of fuel burned.
This could also be an indication that your exhaust pipe needs to be cleaned, or perhaps that it is not optimally configured. Take a moment to check our installation page to see if adjustments need to be made in regards to your exhaust configuration.
The exhaust pipe should also have a brush ran through it at least once every ton of fuel burned in order to remove any ash and creosote that develops along the walls of the exhaust pipe. This is very important for efficient use of your pellet stove and also from a safety point of view.
CREOSOTE IS A FLAMMABLE SUBSTANCE. FAILURE TO PROPERLY CLEAN YOUR EXHAUST PIPE AS INSTRUCTED CAN RESULT IN A DANGEROUS FLUE FIRE. CREOSOTE BURNS VERY HOT AND DILIGENCE IN PROPER CLEANING IS IMPORTANT TO AVOID A POTENTIALLY DANGEROUS SITUATION.