Duh. Sorry, I wasn't paying attention.
Did you try resetting it with the toggle switch accessible from the outside hatch? Turn it off and back on.
Open the hatch and listen carefully when someone turns up the thermostat. You should hear a click when the control board turns on the gas valve and you should smell propane in the exhaust. If you don't hear the click either the sail switch, the control board, or the gas valve is bad. If the gas valve is working, then the sail switch and at least part of the control board is working. With the blower running, listen for a repeated "pop" as the control board tries to light the gas with a spark.
I have a Duraflame, so I'm not familiar with Suburban but there is an online manual for the SP-30. Unfortunately there may not be much you can do without tools.