gas fireplace shuts itself off - then restarts
GOt a gas fp on my main floor (Hussong Mfg "Sundance") that lights off fine and burns cleanly (blue flame).
after it's been on for anywhere from several minutes to 1/2 hour or more it'll shut itself off and then, after a little while, turn back on.
Unit doesn't appear to be overheating and it does this whether I have the blower fan on low or high.
can anyone suggest what is going on here?
thx in advance for any help. Mark in Mn