What happens to the gas valve during an overheating event?

During an overheating event, the gas valve de-energizes as a safety measure to prevent further heat build-up and potential hazards, such as fire or explosion. When an overheating condition is detected, the system automatically shuts off the gas supply by de-energizing the valve. This action is crucial for ensuring that no additional fuel is introduced into the system, which could worsen the overheating situation.

The other options do not reflect the safety protocols typically in place for gas appliances. For instance, if the valve stayed open, it would continue to allow gas flow, creating a dangerous situation. Similarly, increasing flow during overheating would escalate the risk of a fire hazard. Triggering the blower can sometimes occur but is typically part of a different response mechanism to cool down the appliance rather than directly pertaining to the behavior of the gas valve during an overheating event.