Burning electric smells are not very common when an HVAC system is properly maintained.
However, this is not mean that they will not happen once in a while.
They come about due to a malfunctioning blower. In most cases, this component of your heater or furnace overheats and then emits an electrical smell. In most cases, the furnace will shut down immediately. This is a protective mechanism that helps the heating systems not to cause further damage. Unfortunately, whenever there is an issue with the furnace, it fails to self-regulate, and the blower will continue operating even beyond this point. Consequently, the heat levels get to dangerous levels and may be disastrous if ignored. Immediately you detect such a smell or metallic smells, you can quickly replace the unit’s filters. When the air filter is clogged, it tends to work overtime and can be dangerous and expensive. Whenever the system overheats, there is a potential for total and permanent shutdown, which may replace the entire system. Always reach out to the HVAC professional you trust for the right advice and direction on what to do. Sometimes a swift intervention can help sort things out faster. Consult extensively to know if your fears are valid or if you are overthinking the smell. Learn to differentiate between ordinary furnace odors and those that are not only strange but indicative of serious issues. The best move is to work with a trained and seasoned professional who knows the ins and outs of the HVAC system. An electrical HVAC smell should not make you panic.