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Old 01/10/2008, 10:14 PM
Macimage Macimage is offline
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Join Date: Jan 2000
Location: Quartz Hill, CA
Posts: 1,155
I've read that pbt's are very sensitive to stray electrical current. You may want to check that you don't have a heater, powerhead, etc. that is leaking current.

Good Luck!
Joyce