If your dog’s hidden fence has stopped keeping them in the yard, the most common causes are a dead or failing collar battery, a break somewhere in the buried wire, or a setting that’s shifted on the transmitter. Start with the collar and battery before assuming there’s a bigger problem — that’s the fix most often needed.
Check the Collar and Battery First
A collar that’s stopped beeping, vibrating, or correcting is the number one reason a system appears to “stop working” entirely. Before anything else:
- Confirm the collar battery isn’t dead. Rechargeable collars can fail to hold a charge as they age; disposable batteries just run out.
- Check that the collar is sitting correctly against your dog’s neck — fur, especially on thicker-coated breeds, can block the contact points from reading properly.
- Test the collar near the boundary wire yourself (without your dog) to see if it beeps or signals as expected.
If the collar tests fine near the wire but your dog is crossing the boundary anyway, the issue is more likely training or motivation than equipment — see the FAQ below.
Check for a Wire Break
If the collar and battery are both fine, the next most likely cause is a break in the buried boundary wire. This usually shows up as one of two patterns: the whole system stops working (a full break), or it only fails in one specific area of the yard (a partial break or a spot where the wire’s been nicked).
Common causes of a wire break include:
- Landscaping work — new plantings, fence posts, or deck footings dug through the wire’s path
- Aerating or dethatching the lawn
- Frost heave over winter, especially with older or shallow-buried wire
- Rodent damage
A transmitter with a fault light or steady beep is usually telling you there’s a break somewhere in the loop. Finding the exact location without the right equipment is difficult — this is where most owners call in a repair technician rather than trying to trace it themselves.
DIY Fix or Call a Professional?
Battery and collar issues are usually straightforward to sort out yourself — replacing a battery or repositioning the collar takes a few minutes. A wire break is a different situation. Locating the break point in a buried line usually requires a wire locator, and digging up sections of yard to search for it isn’t practical for most owners.
We repair and service hidden fence systems from any brand — Invisible Fence®, DogWatch®, PetSafe®, and DIY installs — and carry compatible batteries and collars, so you don’t need to replace the whole system to get it working again.
FAQ
Why did my invisible fence suddenly stop working?
The most common reasons are a dead collar battery, a broken boundary wire, or a shifted transmitter setting. Check the collar and battery first, since that’s the fastest and most common fix.
How do I know if it’s the wire and not the collar?
Test the collar near the boundary wire without your dog present. If it doesn’t beep or signal at all, and the battery is confirmed good, the wire is the more likely culprit — especially if the transmitter is showing a fault light.
Can I fix a wire break myself?
It’s possible, but finding the exact break point in a buried wire usually requires a wire locator. Most owners find it faster and more reliable to have it located and repaired professionally.
Does RadioPet only work on RadioPet systems?
No. We service and repair hidden fence systems from other brands as well, including Invisible Fence®, DogWatch®, and PetSafe®, along with compatible batteries and collars.