2800 — Generac 2800 — Auxiliary Shutdown / E-Stop Active
Alarm 2800 is an Auxiliary Shutdown: an external Auxiliary Shutdown / Emergency Stop (E-Stop) switch is in the OFF position. Units have a rear-mounted E-Stop (and 15 kW+ units also have one on the firewall); ALL must be ON for the generator to run. It is NOT a scheduled-service reminder. (Meaning corrected against official Generac support documentation / Evolution controller e-code list; older Nexus controllers may differ — confirm for your unit.)
- Keep using it?
- Limited use only
- DIY difficulty
- Easy
- Verified against
- support.generac.com ↗
How to fix it
- Locate and reset all Emergency Stop / Auxiliary Shutdown switches (rear of unit, and firewall on 15 kW+ models) to ON.
- If none are pressed, have the aux-shutdown wiring checked.
Why it happens
Typical signs: 2800 / Auxiliary Shutdown in the alarm log · Generator will not start · An E-Stop / shutdown switch is pressed or in OFF
- E-Stop / auxiliary shutdown switch OFF or tripped A red emergency-stop or aux shutdown switch is engaged.
- Auxiliary shutdown wiring fault An open or short in the aux-shutdown circuit.
More Generac generator codes
Frequently asked questions
What does the 2800 code mean on a Generac generator?
Alarm 2800 is an Auxiliary Shutdown: an external Auxiliary Shutdown / Emergency Stop (E-Stop) switch is in the OFF position. Units have a rear-mounted E-Stop (and 15 kW+ units also have one on the firewall); ALL must be ON for the generator to run. It is NOT a scheduled-service reminder. (Meaning corrected against official Generac support documentation / Evolution controller e-code list; older Nexus controllers may differ — confirm for your unit.)
What causes the 2800 code on a Generac generator?
E-Stop / auxiliary shutdown switch OFF or tripped: A red emergency-stop or aux shutdown switch is engaged. Auxiliary shutdown wiring fault: An open or short in the aux-shutdown circuit.
Is it safe to keep using a Generac generator with a 2800 error?
Limited use only. This is rated a serious-severity fault.
How do I fix 2800 on a Generac generator?
Locate and reset all Emergency Stop / Auxiliary Shutdown switches (rear of unit, and firewall on 15 kW+ models) to ON. If none are pressed, have the aux-shutdown wiring 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: support.generac.com.