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.
Hard to describe the smell -- a little like propane, but also a hint of garbage smell. We do have propane gas, but the area where it smells we shut off that line and we still get the smell. We have a 13-year-old house that has been waterproofed. We have treated the basement with an ozone generator, so we don't think it is mold.