A breaker exists to cut power when a circuit is overloaded or faults. The reported problem with many FPE Stab-Lok breakers is a tendency to fail to trip when they should, leaving the wiring unprotected. That defeats the panel's core safety function.
You cannot reliably tell a good FPE breaker from a bad one by looking at it, and the failure mode is hidden until an overload occurs. For that reason most inspectors and electricians recommend replacing the panel rather than relying on it.
If your Bloomington inspection identifies an FPE panel, treat it as a negotiation item. A licensed electrician can evaluate and replace it, and documenting this before closing protects both safety and any future insurance questions.
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