I have a profile 30 free standing pellet stove that is five years old. It has been used less than average. I clean it out regularly. Everything: I brush the heat pipes behind clean out port holes. remove the brick and vacuum. I use a brush to get in the middle where the vacuum doesn't reach. 3 months ago the pellet stove would not light. I cleaned everything took everything apart 3 times before I narrowed it down to the igniter. My landlord ordered a new one and installed it. The stove works with a thermostat. Once the stove reaches room temp. and shuts down, when it drops below the temp set on thermostat and tries to start up again the stove sometimes doesn't start. Usually during the middle of the night this happens. It continues to dump pellets into ultra grate is over flowing with a lot until it goes into fault mode. When I wake in the morning my house is 59 degrees. As I mentioned before, I have cleaned everything including the flu. I checked the installation specs. and measurements everything seems fine. Any suggestions would be greatly appreciated. Thank You