If the wiring appears intact, what other components might be contributing to Generac error code 1603?

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Grade: Education Subject: Support
If the wiring appears intact, what other components might be contributing to Generac error code 1603?
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If the wiring is good, the problem likely lies within the AVR itself or the main control board. The AVR could be internally damaged and unable to regulate voltage correctly. Alternatively, the control board might have a faulty circuit preventing proper communication with the AVR.