What is a common symptom of improper combustion in a gas appliance?

High carbon monoxide levels are a significant indicator of improper combustion in a gas appliance. When gas does not burn completely, it can produce carbon monoxide, a colorless, odorless gas that is highly toxic. Proper combustion typically results in a clean, blue flame, indicating efficient burning and good ventilation. In contrast, the presence of carbon monoxide suggests that the appliance is not functioning correctly, potentially due to issues such as insufficient air supply or a malfunctioning burner.

Recognizing high carbon monoxide levels is crucial, as it can pose serious health risks to individuals in the vicinity. It's important to regularly check and maintain gas appliances to ensure they operate safely and effectively, reducing the risk of hazardous byproducts like carbon monoxide. This understanding is essential for anyone working with gas appliances to ensure both safety and compliance with regulations.