When I turn on my heater Why do you smell gas coming out of the vents in my 1997 ford contour?

If you smell gas coming out of the vents when you turn on the heater in your 1997 Ford Contour, it could indicate a fuel leak or an issue with the fuel system. This might be due to a failing fuel line, a damaged fuel injector, or exhaust gases entering the cabin. It's important to address this immediately, as it poses a safety hazard. Have a qualified mechanic inspect the vehicle to diagnose and fix the problem.