I have a 40,000 btu Ready Heater brand kerosene torpedo heater. It will fire, but only for about 5 seconds. When you turn it on the glow ignitor comes on. Then the fan comes on with a mist of fuel and it does light. Shuts off in seconds. The screen on the fuel hose into the fuel tank is clean. Have cleaned the photo eye with a Q - tip and alcohol. I temporarily have the filter out of the back of the air pump so there is no restriction. Glow ignitor comes on properly. Two gallons of new kerosene. Looks good while burning those 5 seconds then it just turns off. What should I be looking at next. Can I test the photo eye? Could I just use a jumper wire where the photo eye connects. Thank you for your advice.