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How do you test a Fisher Paykel GWL11 drain pump w/ multimeter?


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6 replies to this topic

#1 Furious-sun

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Posted 24 May 2012 - 10:38 PM

I have a GWL11 washer thats about ten years old. Main board was replaced June 2011 and things have been working fine since. Recently the washer stopped mid cycle and wouldn't drain, not cool. I got into the diagnostic mode and the drain pump still won't come on. I bailed the water and dropped the pump. Impeller spins smooth no burns or corrosion anywhere. Nothing clogging the pump or drain hose.

So is there any way to test the pump with a multimeter to rule it out? :kopkrab:

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#2 kdog

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Posted 24 May 2012 - 10:39 PM

Is there voltage at the pump ?

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#3 kdog

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Posted 24 May 2012 - 10:43 PM

Try running pump only with a Cheater Cord

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#4 kdog

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Posted 24 May 2012 - 10:48 PM

Fun fact to know:



After Reassembly and Testing…

If the machine is advanced to either rinse or spin

whilst filling or re-circulating, it may take up to 3

minutes before the drain pump turns on. This time

allows the diverter valve to cool down and direct

the water flow to the drain hose.


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#5 DADoESTX

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Posted 24 May 2012 - 10:48 PM

To test the pump with a meter, simply disconnect the wires, set the meter to an ohms scale and test across the terminals. Should read 7 ohms at normal temp (pump not hot from running).

The pump runs on 120v current, so as kdog suggests, it can be bench-run with a test cord.

#6 asteysn2

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Posted 24 May 2012 - 10:49 PM

The drain pump should have a resistance of about 7.5 ohms. Anything less than 6 ohms and I would not use the pump again. However there is also the possibility of the pump tripping its thermal sensor even with acceptable resistince. The windings (coil) can get hot from inductive impedence and that cannot be as easily identified. If the pump is shutting down then starting again after a few minutes, that is the cause. Replace the pump, AND install a 2.5 amp SLO_BLO fuse in the pump drain wire.
Robert Sankey
Coastal Appliance, Heating & Air
Website: www.coastalappliances.com
email: coastalserve@gmail.com

#7 kdog

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Posted 24 May 2012 - 10:59 PM

8 DEC 2011: Ecosmart washer: The pump that is currently used in the EcoSmart washer has now been superseded as follows:
Part number 420325P has been superseded to 479595. Pump will include a fuse kit that needs to be fitted.

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