When the car is running and the a/c or heat gets turned on while the car is stationary but on it comsumes the car w/ a gas smell. Even in the drive-thru! I"m not sure what is causing this. It has done it since I bought the car. I'm worried it will make my children or myself sick?!?

Every time we get in our car and start it and turn on the heater we get a gas smell throughout our car. This only happens when we start the car with the heater on. We also have an annoying on and off clicking sound even when our turn signal isnt on.

i smell gas in my car, especially when i turn on the heater or cooling system, im not leakin any gas any where to my knowledge. so whats the deal???