You should continue to TEST 2 below and check the wire leads on the valve. If there are empty circuits that are functioning you can simply switch the wires into the functioning slots. If the valve no longer buzzes after the wires have been switched then the circuit on the controller is faulty. You can check the circuit by switching the wires from a circuit that works into the slot for the valve that has the buzzing solenoid. If only one or two valves are making a buzzing sound it could be those paticular circuits on the controller are faulty. Is just ONE (or a couple) solenoids buzzing? If only a few solenoid valves in a zone are making a buzzing noise then go to the next question. If the manufacturer says the noise is not normal the problem is most likely either a bad controller or a bad common wire. The brand of valves may be slightly louder than other brands, contact the manufacturer to determine if the noise you hear is normal for your model. Below are some questions to help you detemine the cause and solution to remedy your buzzing solenoid.Īre all of your valves operating from the same irrigation controller and do all these valves buzzzzzzzzzzzzzzzzzzzzz? It is NOT normal to hear it make a loud buzzing sound. It is normal to audibly hear the solenoid softly buzz when it is turned on and to also hear it click when it is turned on or off. The circuit is completed by attaching a common wire from the valve back to the controller. An irrigation controller (timer) is an automatic electrical control station that sends an electrical 24-volt impulse to the valve along a lead wire. Use the simple tests below to evaluate the possible causes and solutions to fix your buzzing valve solenoid.Ī valve solenoid is an electromagnetic device that makes an irrigation valve open and close. There can be a few causes for this problem. Valve solenoids that “buzz” are often caused by inadequate voltage reaching the solenoid.