Does your Harman control board have 'dead spots' in the controls for the fans or auger? Send us your board and we will replace the parts that are causing the problem, heck we'll even replace the ones that aren't so they don't fail in the near future. We will also go over the board and touch up any cold solder joints we may find. Most boards are returned within a day or two of being received. Shipping price is the cost to get your board back to you. You must handle shipping it to us.