Simple answer: no. But it can happen, and when it does it means you need furnace service in Woodland Park, CO.
Rust and other types of corrosion are almost always bad news for any metal appliance because they weaken the metal. Rust is often an indicator of advanced system age or a failure of another part of the appliance designed to prevent corrosion. These are all true of a natural gas furnace. We’ll go deeper into what this means below. Just please don’t allow rust to stay on your furnace without taking steps to see what’s wrong and what the next step is.