I have a Lockhart that is about 1.5 years old that never had any issues until now. Will not heat up past 150, the fan will shut off when the igniter is done and shuts off. When you shut off the grill, the fan will turn back on to high as normal. After the initial process of starting the igniter goes off and the fan will shut off and will still feed pellets to maintain the temp around 150. Replaced control board, fan, and rtd probe.