My Hedge Trimmer is not operating properly, what do I do? Problem Possible Cause Possuble Solution Unit does not run Extension cord not connected to the power plug Extension cord not connected to power source The safety button or the trigger switch is not fully engaged Check extension cord is fully connected to tool Check extension cord is fully connected to a live receptacle Check safety button and trigger switch is fully depressed Slow running, noisy, or hot blades Dry, corroded blades Blades or blade support bent Bent or damaged teeth Loose blade bolts Lubricate blades Straighten blade or blade support Straighten teeth Tighten blade bolts Related articles Does my pole hedge trimmer come with a shoulder strap? My SJH904E Hedge Trimmer isn't operating properly, what do I do? How do I sharpen the blades on my Hedge Trimmer? How should I maintain and store my Hedge Trimmer? My Cordless Grass Trimmer is not operating properly, what do I do?