Leak in the Fuel Supply. Another common problem that impacts low or yellow flame output is a leak between the tank and the grill. To troubleshoot, apply soapy water to the propane tank valve, connector, hose, all the way up to where the hose connects to the burner assembly on your grill.
Low Flow or Low Flames are generally characterized by having one or more of. For LP gas grills - Since 1995, all regulators (the part that attaches to the gas .