Which maintenance action can help prevent carbon monoxide issues in gas heating systems?

Regularly checking and cleaning burners is vital in preventing carbon monoxide issues in gas heating systems. Over time, burners can accumulate dirt, soot, and other residues that can hinder their performance. If burners are not functioning properly, it can lead to incomplete combustion of gas, resulting in the production of carbon monoxide instead of carbon dioxide. By ensuring that the burners are clean and functioning efficiently, you significantly reduce the risk of unsafe levels of carbon monoxide being produced. Properly maintained burners help ensure complete combustion, which is crucial for safe operation and efficiency of gas heating systems.

The other maintenance actions, while important for overall system performance, do not directly address the root cause of carbon monoxide production in the way that burner maintenance does.