I recently bought an old manual start Harmon P61 pellet stove. It’s a 1998 model. The status light is blinking three times indicating a bad ESP probe. I tried a brand new probe from the dealer and the light is still blinking three times. The stove runs at minimum flame and won’t shut down: Is this a bad control board? A new board cost $279 and.cant be returned so I want to make sure this is the problem before I buy it. I talked to a technician at the local dealer and he told me to check the prongs the esp probe plugs into but they look fine. Any help would be greatly appreciated! I’m on a budget and very frustrated.