Report "I have a Mr. Heater Big Max 75k Btu natural gas heater and when I turn my thermostat on the main burner lights and stays lit for a 45 seconds to 2 minutes, then goes out. It repeats this process and will never stay lit, I have let do this up to five times and it never stays lit. On the led light it never flash anything other than the fast light. Which the manual says is normal"