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[ATTACH=full]57606[/ATTACH]

GFCI's sense (use one to find another) two types of current - from the outlet thru hot and neutral - then the other which is ground to neutral - if the GFCI is old, it should be replaced and have someone inspect the Neutral to Ground - make sure it's bonded - at the breaker box.

Each room (for example - per breaker) would have a 3-wire running back to the breaker - thru the house wiring. IF Neutral and Ground were "lost" the GFCI can't sense the rise in potentials between Neutral and Ground - with ground being the hair dryer finding a better return to ground thru the sink - if it were ever dropped.

So, if the ground at the outlet is faulty or the Neutral to Ground "bond" at the breaker box is bad. GFCI's can "sense" something and buzz, but not trigger because the ground itself at the GFCI has damaged the GFCI's ability to work - it's not working correctly.

Replace it ASAP - this noise may be what saves your life.

There is a "TEST" and "RESET" on the GFCI - press the TEST button, if you hear a loud click and the outlet goes dead - that trigger works, You can firmly press RESET to restore the GFCI outlet. But if it does not trigger or the noise is still there even after clearing the test condition - just replace the GFCI - it may cost $15-18 bucks but it's cheap insurance to protect from an accident next time.

<blockquote data-quote="Handy Andy" data-source="post: 785271" data-attributes="member: 52309">[ATTACH=full]57606[/ATTACH]GFCI&#039;s sense (use one to find another) two types of current - from the outlet thru hot and neutral - then the other which is ground to neutral - if the GFCI is old, it should be replaced and have someone inspect the Neutral to Ground - make sure it&#039;s bonded - at the breaker box. Each room (for example - per breaker) would have a 3-wire running back to the breaker - thru the house wiring. IF Neutral and Ground were &quot;lost&quot; the GFCI can&#039;t sense the rise in potentials between Neutral and Ground - with ground being the hair dryer finding a better return to ground thru the sink - if it were ever dropped. So, if the ground at the outlet is faulty or the Neutral to Ground &quot;bond&quot; at the breaker box is bad. GFCI&#039;s can &quot;sense&quot; something and buzz, but not trigger because the ground itself at the GFCI has damaged the GFCI&#039;s ability to work - it&#039;s not working correctly. Replace it ASAP - this noise may be what saves your life.There is a &quot;TEST&quot; and &quot;RESET&quot; on the GFCI - press the TEST button, if you hear a loud click and the outlet goes dead - that trigger works, You can firmly press RESET to restore the GFCI outlet. But if it does not trigger or the noise is still there even after clearing the test condition - just replace the GFCI - it may cost $15-18 bucks but it&#039;s cheap insurance to protect from an accident next time.</blockquote>

[QUOTE="Handy Andy, post: 785271, member: 52309"] [CENTER][ATTACH type="full"]57606[/ATTACH][/CENTER] GFCI's sense (use one to find another) two types of current - from the outlet thru hot and neutral - then the other which is ground to neutral - if the GFCI is old, it should be replaced and have someone inspect the Neutral to Ground - make sure it's bonded - at the breaker box. Each room (for example - per breaker) would have a 3-wire running back to the breaker - thru the house wiring. IF Neutral and Ground were "lost" the GFCI can't sense the rise in potentials between Neutral and Ground - with ground being the hair dryer finding a better return to ground thru the sink - if it were ever dropped. So, if the ground at the outlet is faulty or the Neutral to Ground "bond" at the breaker box is bad. GFCI's can "sense" something and buzz, but not trigger because the ground itself at the GFCI has damaged the GFCI's ability to work - it's not working correctly. Replace it ASAP - this noise may be what saves your life. There is a "TEST" and "RESET" on the GFCI - press the TEST button, if you hear a loud click and the outlet goes dead - that trigger works, You can firmly press RESET to restore the GFCI outlet. But if it does not trigger or the noise is still there even after clearing the test condition - just replace the GFCI - it may cost $15-18 bucks but it's cheap insurance to protect from an accident next time. [/QUOTE]

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