Hotpoint BWD129 - Wash temperature too high
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Water temperature switch
The water temperature
switch directs power to the valve. If there is no power getting to the
valve, check the switch according to the wiring diagram for your
Faulty Water Inlet Valve
The water inlet valve is
the device that meters water from the supply lines into your wash tub.
On domestic washers, there are two lines, one hot the other cold. These
valves are susceptible to mineral build-up and sediment deposits.
There are two common failure modes:
Failure Mode One: Valve will not open.
you can verify that the solenoid on the valve body is receiving the
requisite voltage and the valve will not open, then it is faulty.
Since the solenoids operate independently, it is likely that one side
of the valve will work and the other will not. This can produce strand
results such as a very hot wash when warm is selected (due to no cold
water). Or the reverse in that the wash water is cold when warm is
selected. If mineral or hard water deposits are a problem, you may
witness a substantial increase in the time required for the tub to
fill. This is caused be a decrease in the flow ware of the valve.
Failure Mode Two: Valve opens but will not close.
is verified by a valve that allows water to flow into the tub even
though no power is being supplied to the solenoid. This one is usually
quickly diagnosed when the machine begins to overflow and the power
plug for the washer is disconnected from the wall. However, this will
not stop the water from flowing into the machine. The water must be
shut off at the wall. As with the previous failure mode, the variant of
this failure mode is that it may take the valve a while to completely
bridge the flow of water after the power has been removed from the
How to Diagnose?
There are a
couple of ways to diagnose a faulty valve. However, there is a simple
test that one can perform that will usually let you know if the water
inlet valve is faulty.
When set to cold wash
and rinse, the unit will not fill. When set to warm wash and cold
rinse the washer will fill with hot water only and will fail to rinse.
This is a common scenario where the cold water side of the valve does
not appear to be contributing to the fill, but the hot water side
does. This symptom could be easily reversed where cold water is being
supplied, but never hot water.
So, how can the problem be
determined? It is as simple as switching the wire harness plugs on the
hot and cold side. In the example above where the cold water is never
being supplied, the symptoms would be the opposite when the wiring
harnesses were switched. So the machine would produce only produce
cold when warm or hot is selected. No water should be present when you
select cold. This verifies that the timer, wiring and switches are all
in working order. Assuming this tests checks out, you simply need to
replace the water inlet valve.
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Dec 23, 2008 |