I have a surge protector / line conditioner for my AV equipment. I just moved it to a new receptacle and the unit is indicating there's a problem (see attached image).

However, when I test with my ancient outlet tester, it comes up "Correct" and everything seems peachy. I'd love to get a sense of what's amiss before I invest in a visit from an electrician. Any ideas? enter image description here

  • Hello, and welcome to Home Improvement. Is this outlet tester one with three lamps, two of which should be lit? And, you should probably take our tour so you'll know how best to participate here. – Daniel Griscom Nov 3 '19 at 20:55
  • Yes. The tester has three LEDs and there were two green LEDs lit for this receptacle. The Panamax surge protector has a line fault indicator, but the manual doesn't really go into details about what's it's detecting. – Harold Check Nov 4 '19 at 21:10
  • It's hard to tell from here, but my guess is that your surge protector is faulty. But again: we can't know for sure remotely. – Daniel Griscom Nov 4 '19 at 21:11

Most of the cheap little 3 prong outlet testers with thee LEDs cannot detect a "bootleg ground", ie where the ground and neutral are swapped or connected together. The surge protector may be able to tell the difference because for that device, this is a more critical necessity, which would explain the discrepancy.

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