[HayZee518]

In answer to your original posting - lights flash when the pump is starving of fuel. check the screen below the float chamber. shut off the fuel outside and make a channel out of aluminum foil and remove the large screw. drain the bowl's contents into a shallow cup. remove the two screws and the filter should come out. use clean kero and clean the screen. I noticed a bunch of crap inside the float chamber. take it out of the heater and thoroughly clean it with Q tips and rags. Re-assemble it and put it back together in the heater. you can use permatex on the old gasket when you put back the filter screen inside. the spring goes onto the element and inside the far end of the filter chamber. the plastic "tit" fits the small depression on the filter cover.
lack of fuel, no ignition will cause the unit to lock out.