Washing Machine Fills With Water Overnight
I have a four year old washing machine. My problem is that if the machine is left idle for over 12 hours, it is frequently filling with foul water. I suspect that there may be a blockage somewhere related to lint & dog hair, so my question is;
Where is the blockage likely to be, and can I access it? Are there any other likely causes for the "back-filling"?
Solution Summary
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Washing machine back-filling with foul water when left overnight
- The problem
- A four-year-old washing machine was frequently found with foul water inside after being left unused for more than 12 hours.
- Likely cause
- The strongest supported cause was sink waste water siphoning back into the washing machine through the drain hose, particularly if it drained into a connection on the sink U-bend and the hose did not rise high enough. A leaking fill valve was mentioned only as an alternative cause for clean water, not foul water.
- What fixed it
- The drain hose position was adjusted so that waste water could not run directly back into the machine. The accepted advice was that the hose should be tied up so the run goes uphill by at least 4 inches before reaching the waste connection.
- Checks to try
- Confirmed the water inside the machine was foul rather than clean
- Checked whether the washing machine drained into a connection on the sink U-bend under the sink
- Adjusted the drain hose routing/height
2 Answers
It's most likely to be water from the sink siphoning into the washing machine. Does the water from this washing machine pump out to a connection on the U bend under the sink?
If so, make sure the drain hose is tied up in such a way that water from the sink doesn't have a direct run down the drain hose into the washer. It should have to go uphill at least 4 inches. This would make it impossible for water to trickle down into the washing machine.
The only other thing that causes water to seep into a machine overnight is a leaking fill valve - but this would be clean water and not foul. ( Related: Washing machine fills with water overnight or when not in use )
Need Professional Help or Spare Parts?
Thanks! We had a fiddle with the drain hose and the problem has proven completely solved!
Thanks again (I had no idea it would be so simple)
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