Thanks, I was checking voltage at the wrong terminal, I checked at pv-mv/pv and had 28V, so I guess the board is OK?. Pilot tube is clear, when I removed it I could blow through it, gas at the propane tank is the same tank I use for my home, and everything is working there, although it goes through a different I don't have a gauge to check the pressure, but I'm guessing its a fuel supply issue, either from the shutoff value at the tank, before the heater or the heater valve.