Why does my Jet JFM-5 Power Tool mortiser keep tripping the circuit breaker?
- Bbianca74Aug 13, 2025
Your Jet mortiser might be tripping the circuit breaker due to several reasons. It could be a blown fuse or tripped breaker (replace the fuse or reset the breaker), a damaged cord (replace the cord), or a loose electrical connection (check and tighten all electrical connections). If the mortiser frequently trips, try taking a lighter cut, as too heavy a cut can cause overloading. Also, ensure the mortiser is on a circuit of the correct size. Look for signs of electrical arcing, which indicates loose connections or circuit overload. If these steps don't resolve the issue, the motor or start/stop switch may have failed, requiring professional testing and repair or replacement.