Burning electric smells are not easily familiar when an Heating and A/C system is respectfully ran tests on, however, this is not mean that they will not happen once in a while, then they come about due to a malfunctioning blower, then in most cases, this component of your heating system or furnace overheats and then emits an electrical smell.
In most cases, the furnace will shut down instantly.
This is a protective mechanism that helps the boilers not to cause further detriment, however 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 hastily update the unit’s filters, and 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 update the entire system, always reach out to the Heating and A/C professional you trust for the right advice and direction on what to do. Periodically 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 modest furnace smells and those that are not only strange however indicative of extreme troubles. The best move is to work with a trained and seasoned professional who knows the ins and outs of the Heating and A/C system. An electrical Heating and A/C smell should not make you panic.