Gas fireplace – no spark for igniter – Martin DV5500 RVN

look at page 22 of the manual: http://www.heatilator.com/downloads/installManuals/4031-551.pdf

using a multimeter, check the voltage being sent to the valve while the fireplace is on, which should be the green and orange wires. the re-check it after you turn it off and the pilot is still on. if the on and off voltages are different, then your gas valve is faulty. if the voltages are the same, then your controller is faulty.

if the it's valve, do not replace it yourself. in nearly every jurisdiction, it is illegal for non-licensed people to do work on gas fixtures.

note that it might also be that you just never noticed that the pilot remains on for a brief time as it burns the residual gas in the line.

I find the burner needs maintenance when not burning with all ports, usually the holes are plugged with rust and a wire brush works great to clean, in some cases with heavy cast burners I have needed to poke a steel wire through the holes to clear the debris out. Is there a safety issue? Yes you are not getting proper combustion this can lead to excess gas build up and even higher CO levels, usually burners are easy to clean give it a try with a wire brush and see if that solves the problem, if not a wire or small drill bit can be used to clear the holes.