I have a Mendota Seabrook Model D-30 Gas Fireplace that keeps shutting off, sometimes after 1 minutes other times after 10 minutes. It has been running fine for about 9 years, but then started having problems this year.
First, it was the pilot light that gave me a hard time. The pilot flame kept shutting off, but once it was on, I was able to turn the heat on, and it stayed on.
After that, the main burner started shutting off after few minutes of operation. I can hear the solenoid clicking when the burner flame dies.
I tried a bunch of things, like cleaning the thermocouple, the thermopile, vacuuming the silt, cleaning the head with a straw, etc...for no avail.