I have an old Rasmussen Chillbuster log set, I think it's ventless. The pilot light was fine for years, but this year it goes out. I've been able to light it a couple times (after pressing the pilot button for minutes) and the single burner worked fine, but pilot light went out after a couple hours and now won't stay lit at all. I can't seem to see a model number but there is a serial number 119490 and there is an "X" on DFC1 and LP (see photo). I've tested the thermopile, which reads fine. Haven't tested the thermocouple or electromagnet. Thinking of just getting a pilot assembly replacement but could it be something else? Attached are some photos. Thanks for any help!