2690
Moderate
Generac · Standby Generators
Controller communication or module sync failure.
Quick Answer
Error code 2690 on your Generac Standby Generators means: Controller communication or module sync failure.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Power cycle controller and connected modules.
2
Inspect connectors for corrosion/loose fit.
3
Update firmware where supported.
4
Retest communication diagnostics.
5
Replace failing module/board if necessary.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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