Is the stove in a slide out? If so, odds are the rubber LP line is pinched. The regulator you see drops the Supply from normal 11.5 inch water column to 10 inches. They rarely fail. They do leak sometimes but rarely fail to deliver LP. What you need to do is, TURN OFF LP AT TANK. Disconnect the LP line from the regulator on the stove. Then while holding the LP line have someone turn on the LP tank. IF the LP spews out turn off the tank. IF NOT, the pinched hose is the problem. Doug