I have tryed everything i can think of! H100IDI heater will not stay lit. I completely dismantled and cleaned and it wasn't that bad. It will fire up and run for about 8 sec then go off. I have jumpered every switch on this thing to find the culprit and none of the switches appear to be bad. I am wondering if the gas pressure is too low maybe? Does anyone have any ideas to try before i call in a service call? We need this heater bad before memorial day weekend!