Water not filling on top load Samsung SW50USP - Inlet valves and pressure switch already tested
Hi everyone,
My Samsung SW50USP top load washing machine is not filling up. The water supply has enough pressure and I cleaned the filters already. I tried checking the voltage at the water valve solenoid but there is no voltage.
Next, I thought the problem might be coming from the pressure switch but when I fill up the machine manually with water, the cycle continue to operate normally so it makes me think that the pressure switch is functional.
Unfortunately, I don't have a continuity meter to test the solenoid as advised in the troubleshooting guide, do you think it's worth investigating deeper an issue with both the solenoids even though there isn't any voltage coming to them once the washing cycle is activated?
Thanks for the support,
Xavier
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Samsung SW50USP top loader not filling, showing 4E with no voltage seen at inlet valves
- The problem
- Samsung SW50USP washing machine would not take in water at any stage. Water supply pressure was said to be adequate and inlet filters had been cleaned. The owner reported 0V at the water valve solenoids during fill and rinse. If water was added manually, the wash cycle then continued normally.
- Likely cause
- The accepted reply considered the pressure switch unlikely, because a stuck full signal would be expected to affect washing and spinning behaviour differently. The strongest supported diagnosis was a supply fault to the inlet valves, such as damaged or broken wiring between the control side and the valves. The exact failed component was not confirmed.
- What fixed it
- Recommended action was to disconnect the appliance from the mains, remove the wires from the water valves, physically trace the wiring back to its connection points, check for visible damage or breaks, and test each wire end-to-end with a continuity meter. No completed repair was confirmed in the discussion.
- Checks to try
- Water supply pressure reportedly adequate
- Inlet filters cleaned
- Voltage checked at water valve solenoids and reported as 0V
- Machine tested on rinses and still took no water
- Machine manually filled and cycle then operated normally
- Machine left long enough to produce error code 4E
- Plastic covering over part of cabling visually inspected
- Parts or tools mentioned
- Continuity meter
- Water inlet valve solenoids
- Wiring loom/cabling
Safety: Disconnect the appliance from the mains before tracing or disconnecting wiring. Further diagnosis should be carried out by a suitably qualified appliance engineer.
5 Answers
If it was the pressure switch I would expect it to not spin or to start washing with no water inside. That’s because if it was stuck “on”, it would think there’s already water inside. Therefore it wouldn’t take any water in. But if it thinks it already has water inside it would also wash with phantom water and refuse to spin because it can’t spin with water inside.
It’s rare for water valves to get no power at all. Does it take any water in on rinses or the last rinse where it would normally also take in fabric softener?
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Hi Andy,
Thanks a lot for your support.
I checked again but it doesn't take any water at any stages, even during the different rinses. I also checked the voltage during the rinses but it's staying at 0V the whole time.
I got the washing machine second hand and I noticed a plastic covering part of the cabling as in the picture attached. Do you think this is original?
I can't tell from the pic. Can you see underneath the plastic?
When you put the washing machine onto a fill cycle (say no fast coloured), exactly what does it do? I appreciate it doesn't fill, but does it make any other noises? If you leave it not filling for about 10 minutes does it time out and give an error code? It should do unless a very old washing machine.
I'm thinking that if it starts up and works normally if you manually add water then it implies that the pcb is happily trying to do a wash cycle and supplying power to the valves but the power isn't getting there. You would need to disconnect the washer from the mains and then take off the wires from the water valves and physically trace them all the way back to where they go checking for any damage or breaks. Then test down each wire with a continuity meter to see if power could run through from one end to the other.
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Yes I can see underneath the plastic.
No i doesn't make any other noises and yes it gives an error code 4E which get resolved when I start filling up the machine manually.
Ok thanks a lot for the feedback, I will try testing the wire when I have more time.
OK. 4E error on my Samsung error codes list is "water supply error" which chimes with the symptoms.
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