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Pay attention to details so you can provide your technician with as much information as possible.
Does the fuse blow when the system starts up or when it’s been running a while?
Learn more: Fall Furnace Maintenance: How to Change Your Furnace’s Air Filter Over time, the vibration that results from the furnace running can cause internal wires to become loose.
Eventually, a wire gets so loose that it causes a short, leaving you with an electric furnace that’s not heating.
If the capacitor that starts the system is failing, you could get intermittent electrical problems.
When an HVAC fuse gets covered in soot and grime, it may no longer be able to connect sufficiently and can fail.Your furnace’s control board has a separate fuse that protects it from getting too hot. 13 Common Causes First the bad news: electric furnace problems can be frustrating.If someone is poking around your furnace and is not too careful, they could more wires so that they come into contact with the furnace’s wire frame, causing them to short and blow the fuse on the furnace board. There are so many possible causes that it can be time consuming to discover the correct diagnosis. You can prevent almost all of these problems by regularly maintaining your HVAC system.It may take some time to find the problematic wire, but fixing or replacing the loose wire will take care of this problem.To prevent this problem in the future, make sure you have your system regularly inspected and tuned up, to keep those wires tightened and prevent shorts.