Home standby generator error codes
Error codes, also known as "alarm codes," indicate the status or an issue with the operation of a home standby generator. Alarm codes will display either a red or yellow indicator light. Many yellow light error codes can be addressed by the end user/consumer, while red light error codes will require a visit from a Generac authorized service dealer. To find a list of error codes that require the attention of a service dealer, see the What Error Codes Do I Need to Call a Dealer For? article for more information.
To learn more about the meaning of error codes based on color, see the What Do the Green, Yellow, and Red Status Indicator Lights Mean on Home Standby Generators? article for more information.
Environment
This article applies to air-cooled (AC) and liquid-cooled (LC) home standby generators.
Alarm code articles
This knowledge base contains many articles that explain alarm codes and associated troubleshooting steps (or how to reach out to a service dealer, in case troubleshooting cannot be performed). We have linked most of them here for convenience.
What if I don't see my specific code?
If you don't see your specific code, try referencing an article about a code with the first two digits of the code you're seeing. For example, if an article exists for 1500, that article generally applies to all variants of that code (1501, 1505, etc.) Some codes indicate issues that cannot be resolved by an end user and require a dealer visit: What Error Codes Do I Need to Call a Dealer For?
- To find a service dealer in your area, see here.
Note: Most error codes can be found in the owner's manual. To locate an owner's manual for a specific generator, see here.
Common owner-resolvable alarm
Maintenance alarm
Note: The check battery alarm is considered a maintenance alarms. This means, your unit is due for its routine maintenance inspection and will occur every year, a on the day of install. This is a reminder to preform your yearly scheduled maintenance. Checking your battery is part of the yearly schdule maintenance tasks.
See the maintenance schedule article for more information.
Operational alarms
Voltage and Overload Alarms
Wiring and Fuse Alarms
Battery Alarms
Additional information on battery alarms and troubleshooting:
Additional Alarms
Wi-Fi & Connectivity
Activation
Blank Controller
Articles on how to clear an alarm or preform a hard reset:
Often confused as an alarm code:
