Carbon Monoxide

• A silent killer, carbon monoxide is a colorless, odorless gas that can be deadly. A gas oven that doesn't completely close but is still used for cooking, can release carbon monoxide into the home. The results can be deadly, killing the unsuspecting as they sleep. At lower exposure levels, carbon monoxide still causes headaches, dizzy spells, fainting and nausea, so exercise caution. If the oven won't close, don't use it until repairs have been made, and install a carbon monoxide detector for safety.
  
  

Health Complications

• Natural gas presents various health risks, but an oven that won't close exacerbates the problem by exposing people to even higher amounts of unhealthy substances. Exposure to gas aggravates conditions like asthma and allergies, according to the Environmental Health Association of Nova Scotia, which adds that those suffering from weak immune systems are particularly susceptible. The association also sites a British study that revealed women using gas stoves had twice the amount of respiratory ailments as those using electric stoves.
  
  

Toxin Exposure

• Just opening the door of a gas oven can release a tide of toxic substances, so one that doesn't close properly worsens a bad situation. Radioactive materials like radon, benzene and xylene are found in gas ovens and also leach into food cooked inside them. Dangerous products of combustion include formaldehyde and nitrogen dioxide; combustion also increases water vapor, which can attract mites and bacteria.
  
  

Fire Risks

• A running stove with an open door is an invitation for injury and fire. A child can easily slip a hand inside an open stove door and sustain a serious burn; a wobbly door could also be pulled open and strike a toddler on the head. The gap created by an open door also provides room for a dish towel or other item to slip inside, catch fire and create a disaster. Keep kitchen items several feet from the oven, and monitor children in the kitchen.