EGO ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed GUARD-ISSUE Error Fix: Cutting Guard Broken or Missing

Error code GUARD-ISSUE on the EGO ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed means: Cutting Guard Broken or Missing. The deflector guard is cracked, missing, or does not mount properly — the guard is a critical safety component that deflects debris and limits line length; do not operate the trimmer without the guard; replace a damaged guard before use; the cutting blade on the guard also trims the line to the correct length for optimal performance

The most successful fix is "Replace Damaged Cutting Guard Assembly" (medium difficulty, ~30 minutes). Estimated DIY cost: $20-$30. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Damaged Cutting Guard Assembly") is rated medium difficulty and takes about 30 minutes. Tools needed: T25 Torx screwdriver, Flathead screwdriver.

DIY cost: $20-$30. Professional repair typically costs $120-$160. Many homeowners save money by trying the top-ranked community fix first.

The EGO ST1521S PowerLoad Trimmer 15 in 56V Cordless String Trimmer with Automatic Line Feed has 8 other known error codes, including: BAT-1-FLASH (Battery Single LED Flashing), BAT-COLD (Battery Too Cold to Operate), BAT-HOT (Battery Overtemperature Protection), BAT-LEDS-OFF (Battery LEDs Not Lighting Up), BAT-NOT-RECOGNIZED (Battery Not Recognized by Tool), and 3 more.