Regency gas Fireplace main burner is auto igniting and won't shut off until i turn off gas valve
It sounds as though there is a short in the wiring somewhere.  Most fireplace remotes will still function manually with the batteries removed.  The C34 utilized a SIT millevolt gas valve.  The remote controls' 2 wires will be attached to the valves "TH" terminal &amp; the THTP" terminal (top &amp; bottom terminals). If you remove 1 of the wires &amp; the issue ceases, its a remote problem - &amp; the fireplace is fine.  At 17yrs old, its probably the remote.  The reason that the burner comes on 30 seconds after lighting is because that about how long it takes for the thermopile to generate enough power to energize the valve.  The click you hear shortly after shutting off the gas is the control valve closing from the pilot being shut off - a safety device.