Have you looked for the flame? If yes, then have your wife cycle the switch while you watch at the box - - you will see the spark from the ignitor if the ignitor is working. You may have a bad ignitor. Check the burner itself to see if it is sooted up. Can you smell propane when the box is turned on? Lot's of things to look at before hitting the panic button. You can even try manually igniting it - - use the long propane powered lighter.
2003 Dodge HO 6 speed Laramie Dually, Jordan controller, RDS fuel tank, Air Ride 25K hitch
Carriage 36' fiver, Onan 6500, Prosine 2K inverter, 3 slides, MORyde IS and Kingpin