Knowing the warning signs of a malfunctioning gas appliance can help you address the issue before it becomes more significant or unsafe. Keep an eye out for the following signs that indicate your gas appliance may require professional repair:

• Unusual or Strong Odors: If you detect a strange or strong smell of gas when your gas appliance is in use, it could indicate a gas leak, which is extremely dangerous and should be addressed immediately. 
• Poor Performance: Is your gas appliance not performing as it should? If you're noticing inconsistent heating, weak flames, or extremely high or low temperatures, it's time to have a professional technician assess the problem. 
• Ignition Problems: Difficulty igniting your gas appliance can be a sign of a faulty igniter, pilot light, or ignition switch. 
• Strange Noises: Rattling, hissing, or banging coming from your gas appliance are indicators that something may be wrong. These noises can be caused by loose components, airflow restrictions, or mechanical issues. Prompt repair can prevent more extensive damage.
• High Energy Bills: A gas appliance that is not functioning efficiently may consume more gas, leading to increased energy costs. 

Remember, it's essential to prioritize safety when dealing with gas appliances. If you're unsure whether your appliance requires repair or detects any signs of a potential gas leak, it's best to err on the side of caution and reach out to AEI ProGas for assistance.