Dishwasher solenoid.

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Old 07-21-17, 12:28 PM
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Dishwasher solenoid.

Hi guys - What should the resistance be across the coil of the water inlet valve's solenoid, please? I am measuring 4.1K ohms, which I thought was a bit high.
 

Last edited by nnamak; 07-21-17 at 02:07 PM. Reason: worded the original incorrectly.
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Old 07-21-17, 04:05 PM
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Welcome to the forums.

Are you sure the meter was set to the right scale ?
You should be using the Rx1 scale. If set to autoranging.... read the display carefully.
+/- 40 ohms would be closer to the mark.
 
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Old 07-22-17, 04:22 AM
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Yes, as I got no reading until I selected the 20K scale (i.e. out of range on 200 ohms & 2K scales).

I'm actually investigating a seemingly common fault of a dishwasher's upper arm not rotating whilst the bottom one is. Have done all the cleaning tips from earlier posts and also replaced the motors 4uF capacitor with no change on fault.

So, could a peculiarly high coil resistance have a detrimental bearing on inlet water flow, and would that then prevent the upper arm from rotating?
 
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Old 07-22-17, 10:33 AM
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If the unit does not fill with enough water there is not enough water to get to the upper arm. You can add water yourself to see if upper arm starts spinning.
 
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Old 07-22-17, 02:23 PM
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Thanks. I'll give that a try tomorrow as it's bedtime here in the UK now, so 'Goodnight'!
 
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Old 07-28-17, 12:29 PM
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Well, I added 2 pints of extra water but still no movement from the upper arm.

I don't know how much water there should be after the initial fill, but it looked quite substantial even before I added the 2 pints.

Any further suggestions for this flummoxed Brit would be most welcome.

Thanks in advance.
 
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Old 07-28-17, 02:17 PM
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The water level is usually just over the heating element.

Did you check for 230vac to the solenoid ?
Is the upper arm not spinning the only problem you are trying to fix.

I'd ask for a make and model but I usually can't access service info on UK appliances.
 
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Old 07-28-17, 02:55 PM
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Yes, the water was above heating element even before I added more.

No, I didn't check for ac at the solenoid as I assumed it must be operating as the machine filled with water, but I will check tomorrow.

Yes, the upper arm is my only problem and as I said earlier, I've had it off and cleaned it, plus the main filter, etc. (They were pretty clean anyway.)

The make & model is Candy CD622A, if that's any help.

Thanks for staying with this.
 
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Old 08-02-17, 01:52 PM
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Checked for ac at solenoid and it's fine, so still a mystery why top arm isn't rotating.
 
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