Norcold fridge issue

[walker111]

Fifth wheel is 4 years old and only small issues I fixed myself.
Lately, when my fridge changes energy source from 120 or my genny to use propane it will not do so at once and go into lockout with check light on fridge. I then have to cycle source and power buttons on and off and sometimes this lights the propane and other times not.
Battery always fully charged and propane tanks full and other propane sources work fine... Ie furnace, hot water etc.

Will pull apart some pieces to start investigating but any thoughts ??????
Thanks

[walker111]

I was thinking igniter or something of that sort. It cools great so I knew it was not flue full of debris.
Will check tomorrow as it is storming here.

[bid_time]

When I first start mine up after it hasn't been run on gas for a several days, it takes a couple of cycles before it purges all the air out of the lines before it lights. So it has to go through about 2 cycles then it will light. No big deal. Maybe you're experiencing the same situation.

[prichardson]

Possibly the spark electrode out of position or eroded. Connections between electrode and board loose. Dirty burner. All are possibilities I would check first.