Troubleshooting

If your electric fence isn't performing as expected, don’t worry — most issues are simple to identify and resolve. Below are common problems, their likely causes, and practical steps to get your system running efficiently again.

Low or No Voltage on the Fence

A drop in voltage is the most common issue and usually indicates a fault somewhere along the fence line.

• Check the energiser is powered and functioning correctly
• Inspect for broken or disconnected wires
• Look for vegetation or debris touching the live wire
• Test voltage at different points to isolate the fault

Energiser Not Working

If your energiser has no lights or output, the issue is likely at the power source or within the unit itself.

• Ensure mains units are plugged in and the outlet has power
• For battery models, check battery charge and terminal connections
• Test the energiser output directly using a fence tester - Electric fence energisers can damage regular voltmeters
• For battery installations, check the charge state and condition of your battery
• Check internal fuse if applicable
  

Fence Shorting Out

Shorts occur when the electric current finds a direct path to ground, bypassing the intended circuit.

• Inspect for wires touching metal posts or other conductive surfaces
• Replace any damaged or cracked insulators
• Remove any wet vegetation or overgrowth
• Use a fault finder to locate the exact point of the short

Animals Not Responding to the Fence

If animals ignore the fence, it may not be delivering a strong enough shock, or they may not be making proper contact.

• Test the voltage with a fence tester — aim for 3,000+ volts for most livestock
• Ensure wires are at the correct height for the species
• Use highly visible polywire or tape to enhance awareness
• Improve grounding if voltage is adequate but shock is weak

Poor Earth System Performance

A weak or faulty ground system can lead to reduced shock strength across the fence.

• The very best earth stake is at least 1m long and driven deep into moist soil, but 20-30cm is usually sufficient
• Add additional stakes if your fence is long or the soil is dry
• Use a voltmeter to check the return path voltage at the earth stake

Intermittent Performance

Inconsistent shocks or voltage drops may be caused by environmental factors or aging components.

• Inspect for loose or corroded wire connections
• Check for moisture in energiser casing or junction boxes
• Look for signs of arcing around insulators or joints

Lightning Damage

A nearby lightning strike can damage the energiser or fence system, often leaving it completely inoperative.

• Inspect for burnt or melted connectors
• Test energiser output directly
• Install a lightning diverter for future protection

Troubleshooting your electric fence is mostly a matter of observation, testing, and methodical checking. Start with the energiser and work your way along the fence line to pinpoint the issue. With the right approach, most problems can be fixed quickly and without specialist tools.