1100
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Generac · Standby Generators
Engine overspeed/underspeed protection alarm.
Quick Answer
Error code 1100 on your Generac Standby Generators means: Engine overspeed/underspeed protection alarm.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Record alarm details and operating context.
2
Check for loose speed sensor connections.
3
Inspect fuel quality and supply.
4
Do not force repeated restarts.
5
Schedule generator technician diagnostics.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
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