Quadra-Fire fireplace gas insert model QFI30FB-IFT. Pilot flame will not ignite about 50% of the time. Have had this problem since new (2 years ago). Dealer tech has been out numerous times (cleaned & gapped igniter wire) but still the same problem. Have to unplug the power cord & then plug back in to reset the control module. Sometimes this works & sometimes it doesn't. Any suggestions on what the problem/fix is would be appreciated.