[/quote] How does that white retainer prevent valves from shutting off? Dirt, misshapen, damage?[/quote]
No there's isn't any debris. It's a design flaw. The plunger gets caught on the white retainer and it wont close. I haven't seen it on the newer solenoids with the larger plungers. I've only seen it on
THIS solenoid.
I always pull that plastic thing off and toss it.