Have a small garden pond with a water pump that is connected to an outdoor covered GFI circuit. Circuit and pond/pump installed approximately 5 years ago. Have not had any problems with GFI tripping until just recently. When I reset the GFI now, I start getting a clicking noise emanating from the GFI when I plug the water pump into the GFI and usually after few minutes or less the GFI trips. Is the noise an indication of a defective GFI or that water pump is defective? The water pump appears to running fine and pumping water during the time the GFI is functioning. Thanks, Forest

I never heard a GFI make noise, but my guess is the GFI is defective. This would be the cheapest start to troubleshooting. I the new GFI trips I am afraid the pump system has a ground fault which may be difficult to impossible to find or repair.