Conduct a gas leak test using soapy water on connections and fittings. If bubbles form, there may be a leak. Contact a professional for repairs.
If you smell gas but no appliance is currently in use, treat it as a potential gas leak. Immediately evacuate the premises, leaving doors and windows open to allow for ventilation. Contact your gas utility provider or emergency services to report the situation and seek professional assistance to investigate and address the gas odor promptly.