Can You Fix These Common Home System Failures? Test Your DIY Repair Skills!Share:FacebookPinterestTwitterMail12. What's the first thing to do if you smell gas in your home?48%Next Correct Incorrect Ventilate the area and evacuate immediately; then call the gas company. 12. What's the first thing to do if you smell gas in your home? Light a match Open windows and leave Call the plumber Turn on the fan 48%