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Starting Member


Monday, August 28th 2017, 11:52am

Loud Pump Start Relay

My pump start relay makes a loud buzzing noise when the system comes on. System components are approximately 6 years old. Rainbird controller and unsure what brand of relay it is. Is this the relay going bad or something less critical..?


Supreme Member

Posts: 5,331

Location: Metro NYC


Tuesday, August 29th 2017, 7:37am

Relays can hum or buzz and still be 100 percent functional.

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