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ChickenGuard String Snapped? How to Replace or Re-Tie It
A snapped ChickenGuard string does not always require a new opener. There is often extra string on the spindle, and ChickenGuard provides model-specific ways to feed out enough cord to reattach the door.
Quick answer
First find where the string broke. If enough cord remains on the spindle, feed out extra and re-tie it to the door. ChickenGuard uses 1.5 mm white nylon string. After any repair or replacement, run a fresh calibration.
Why the string snaps
ChickenGuard identifies animal chewing and abnormal strain as the main causes. A stuck door or someone forcing the door while the motor is holding it can overload the cord.
1. Check how much string remains
If the break is low enough, there may be plenty of unused cord still wound inside the opener.
2. Mark-4 and Mark-5 units release string differently
Mark-4 units can release string manually or during calibration. Mark-5 units use Motion Control in Misc Settings. Follow the procedure for your exact model.
3. If the string broke high, re-thread the internal path
On Mark-5 units, a high break can pull the cord out of the internal guide. The string must be threaded through the guide pieces correctly before the spindle is reseated.
4. Use the correct replacement cord
ChickenGuard specifies 1.5 mm white nylon string, with about 1.5 metres installed. Outside the UK, equivalent nylon cord may be sourced locally if manufacturer replacement string is unavailable.
5. Remove the cause before recalibrating
Check runners, door alignment and anything that could have put abnormal strain on the cord.
6. Recalibrate after the repair
The opener must relearn the open and closed limits after the string is re-tied or replaced.
Frequently asked questions
Can I use any string?
Use cord that matches the manufacturer specification rather than thick rope or stretchy line.
Can I just knot the broken ends together?
A bulky knot can interfere with winding and travel. Re-tie to the door or replace the cord properly.
Sources checked
We checked ChickenGuard’s current snapped-string replacement and string-durability documentation.