that is ot how you test for a cooling fan problem and you should take it to your mechanic so you dont chop off any fingers. Those fans are on a special switch that comes on when the engine reaches a specific temprature. Paul, 38 years ago there was only one fan. Now, a lot of cars actually have two fans.
2) Propane contains an odorant similar to what's put into natural gas. If combustion is not complete, or there are any leaks, then this odorant produces a smell. In addition, in larger tanks typically there is a large tablet of solid odorant sitting in the bottom of the tank.
You are actually not smelling gas. Natural gas has no odor. Utility companies use an additive so that you will smell it. When you turn on the oven, it takes a moment for the pilot light to light the actual burner(s). For those few seconds, gas is being emitted through the burner(s), but is escaping into the air because there is no flame. If the smell goes away shortly and the burner(s) is/are lit, all is well.