The solenoid on one of my zone control valves is not working - the plunger shaft falls out when I take it off and I notice the compression spring is missing. The previous home owner must have tampered with it. I just cannot determine what make valve it is. It is in the ground and the only markings on the valve are 9-6328 and F86. The solenoid has an oval base and attaches to the top of the valve (off to one side) with two screws - it has no threaded round piece at the bottom that just screws on ...
