Atwood water heater problem

Checked out the heater again tonight, and it is working fine on electricity, just not working on gas using the remote switch. I have turned off the electric switch and I'm going to let the tank cool down over night and try the remote switch tomorrow, going to put a new 2amp fuse in too, just in case. I tried unplugging the circuit board, and plugging it back in, but no go. All tubes look clear.
BTW, user manual says if the heater enters lock-out mode there will be an indicator light. Does that mean on the remote switch? it doesn't say in the manual.