If a home inspector or electrician has told you that you have a Federal Pacific or Zinsco panel, you've probably since read a lot of alarming and contradictory things online. Here is the accurate version.
First, the correction almost every article gets wrong
These panels were never officially recalled. You'll see "recall" used constantly, including by electricians who should know better, and it isn't true. The Consumer Product Safety Commission investigated Federal Pacific and closed the investigation without issuing a recall, citing its own resource limits. No federal recall exists for either brand.
That matters because it's the detail that tells you whether the person advising you is repeating something they read or actually understands the situation. The concern is real. The recall is not.
What the evidence actually shows
Federal Pacific Stab-Lok. Independent testing found that a substantial share of Stab-Lok breakers failed to trip within the standards they were labelled as meeting. A breaker that doesn't trip is the one thing a breaker cannot do — the entire purpose is to cut power before a fault becomes a fire. In 2005 a New Jersey court found that the manufacturer had fraudulently labelled the breakers as meeting safety standards.
Zinsco. A different failure, same outcome. The design allows the breaker's connection to the bus bar to loosen over time, which causes arcing and heat. That heat can fuse the breaker's contacts together, so it can no longer trip at all — while continuing to look and feel completely normal.
Why you can't test your way out of it
This is the part homeowners find hardest to accept. A panel like this can operate for years without incident, pass a casual look, and still fail at the moment it's needed. The failure mode is silent. There's no light, no smell, no warning — you find out during the fault the breaker was supposed to interrupt.
The insurance angle
A practical consideration that catches people out: many insurers will decline to write a new policy, or decline to renew an existing one, when one of these panels is identified during an inspection. It's also a common sticking point during a home sale, and one that tends to surface at the least convenient point in escrow.
What to do
Have it identified properly first — plenty of old panels are neither of these brands and are perfectly serviceable. If it is one, replacement is the only real remedy. Swapping individual breakers doesn't address a bus bar design flaw, and replacement breakers for these panels are their own problem.
We'll tell you plainly what you have and whether it needs replacing. If your old panel is fine, that's a perfectly good answer and one we give often.