2680 — Generac 2680 — Low Fuel Level (Diesel Protector)
Alarm 2680 is a Low Fuel Level warning on diesel (liquid-cooled Protector) units: the fuel level is above 10% but below 20% for more than ~60 seconds. It is NOT a transfer-switch wiring issue. (Meaning corrected against official Generac support documentation / Evolution controller e-code list; older Nexus controllers may differ — confirm for your unit.)
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Verified against
- legacy.genconnect.generac.com ↗ Generac Power Zone 410 Controller Owner's Manual, p.32: E-code 2680, Low Fuel Level warning, low fuel switch triggered for 1 minute (20% fuel remaining)
How to fix it
- Refill the diesel fuel tank.
- If the tank is full but the warning persists, have the fuel level sender checked.
Why it happens
Typical signs: 2680 / Low Fuel in the log on a diesel Protector unit · Fuel gauge low
- Diesel fuel tank running low Level between 10% and 20%.
- Fuel level sender fault A faulty sender can misreport level.
More Generac generator codes
Frequently asked questions
What does the 2680 code mean on a Generac generator?
Alarm 2680 is a Low Fuel Level warning on diesel (liquid-cooled Protector) units: the fuel level is above 10% but below 20% for more than ~60 seconds. It is NOT a transfer-switch wiring issue. (Meaning corrected against official Generac support documentation / Evolution controller e-code list; older Nexus controllers may differ — confirm for your unit.)
What causes the 2680 code on a Generac generator?
Diesel fuel tank running low: Level between 10% and 20%. Fuel level sender fault: A faulty sender can misreport level.
Is it safe to keep using a Generac generator with a 2680 error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix 2680 on a Generac generator?
Refill the diesel fuel tank. If the tank is full but the warning persists, have the fuel level sender checked.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: legacy.genconnect.generac.com.