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The Code does not permit an AFCI breaker or other required arc-fault circuit-interrupter protection to be replaced with a standard circuit breaker. This is an error that creates a Code violation. Section 210.12(A) provides the minimum requirements for installing arc-fault circuit-interrupter protection on branch circuits in dwelling units. There is no exception that permits what you describe. You are correct in your thinking that this is removing a protective feature from the system that is most likely trying to signal an arcing fault or something wrong. We recommend hiring a qualified electrical contractor/qualified electrician for this troubleshooting.
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