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Posted by Frank Boettcher on August 8, 2005, 6:50 am
wrote:
>
>> That's true it could be, but they usually fail closed where they will
>> not let any water in. Way to check is to attach a voltmeter to the
>> solenoid terminals and check the voltage as the unit goes through a
>> fill cycle. It the voltage comes up and then does not drop off after
>> the appropriate time, the solenoid valve is doing what it is told to
>> do, that is, stay open.
>
>If electricity opens it, what closes it? If a spring, the spring can be
>broken.
>
You're right. In my experience, however, and it is quite limited, the
coil fails first. I've replaced several that would not open, none
that would not close. doesn't mean that it can't happen. Kind of
like thermostats on cars, they can and will fail both ways.
By checking the voltage you can be sure that the timer/motor is
telling it to open and close properly, and eliminate all but the
solenoid as the problem.
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