1501
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Generac · Standby Generators
Generator frequency/engine speed anomaly detected.
Quick Answer
Error code 1501 on your Generac Standby Generators means: Generator frequency/engine speed anomaly detected.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Place unit in safe state and inspect fuel path.
2
Check for abrupt load changes.
3
Run controlled test cycle.
4
Verify sensor and governor operation.
5
Have technician recalibrate/repair as needed.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
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