I have two year old Harman Accentra insert. I had some work done on my chimney this summer by the same people that installed my Harman Accentra stove. When he finished, he checked my draft by running the stove without pellets on test mode for a good 10 minutes. At the end It threw a code. He was late and packing up and said that when you light it, you might have to plug and unplug it to clear the code. I should have made him do it before he left. Now I tried to light it for the first time this weekend ( i know a little late. I had back surgery this summer and couldn't lift the bags) and I am getting 3 blinks on the status light... ESP probe, the book and internet say. I called the dealer, and maybe they can come out in 2 weeks, or should I just order a esp probe and do it myself. I took the esp probe out already to clean it, so I can. Or could it be the board? As he was unhooking his diagnostic stuff, could he have fried the board?