When any of the burners are ignited, there is a strong smell of propane (unit configured for LP application). When the oven is turned on, there is the same smell. It seems as though when either is turned on and the signal is sent to allow the gas to flow that there is a leak somewhere. The leak location must be in a line that is common to both the range top and the oven. When all controls are turned off, the gas smell dissipates. Any clues as to where I should look?