[HayZee518]

what have you done to the heater prior to this heater lockout? I read through the whole thread starting at posting #1. a few things to check: unplug the heater. unscrew the fuel tube gland nut and gently pull out the tube from the combustion pot. stick something small in the fuel tube in the pot to clean out any solidified soot and carbon. it should go in about three inches. with the fuel tube out of the pot, place the tube into a small can or jar and start the heater. when the unit calls for flame see if you get fuel in the can. if you do, shut off the heater and pull out the plug. replace the fuel tube into the pot fitting and plug in the heater and re-start the heater. the pot should start to get warm near the bottom IF the igniter is working. when a flame is established the flame rod should detect the flame and keep the heater working. if the unit shifts into high heat then shuts down you may need to adjust the flame rod to right in between the area between the pot side and burner ring. get back to me on what you find out, please.