Thanks for all the responses! :)

So, I cleaned & refurbished my dometic, but was out of propane so
reinstalled it w/o checking the function on the bench.   It works very
nicely on 120VAC.  However, I just got the propane tank filled and now
can't get it to light at all - no visible flame or spark.  I tried
sucking on the drain tube with a hose, but can't smell any propane.

Before I remove the unit again (ugh) is there anything stupidly easy
that I'm missing?   I'm pretty sure I hooked everything back up
properly and didn't have any parts left over (a good sign).   How long
does it take to "bleed" the system of air after it's been taken
apart?  I've tried holding the gas button for about 5 minutes but no
luck.

Any tips?