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Last night we noticed that only warm water was coming out of our kitchen sink when we had the lever to the cold side. Went into the bathroom and noticed the same thing. After some research I found a suggestion to shut the water off to the washing machine and check the water at the faucets again. This time the water out of the faucets was noticeably cooler. So is the solution to replace the fill valve on the washing machine or should I continue to troubleshoot. Any suggestions?

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    If it's a lever style faucet, I'd be more inclined to think that it's the ball assembly than the washing machine. – Comintern Aug 9 '14 at 17:50
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    I do not think the washing machine fill valve is the culprit. If a washer/seal on the fill valve fails, the leak-by will not go back into the water supply, it will take the path of least resistance and begin to fill your washing machine drum. – Jimmy Fix-it Aug 9 '14 at 17:52
  • That is what I thought, but when I shut off both water supply lines to the washing machine I got cold water to all the taps in the house. – Steve Aug 9 '14 at 18:22
  • I guess there may be new designs that mix the water a different way. Common ones have solenoids activating washer/plunger valves to tub fill tube. If new machines have some fancy mixing valve to closely control temp then maybe. I still don't see it; your hot and cold water are at the same pressure all the time, fed from the same supply. – Jimmy Fix-it Aug 9 '14 at 18:48
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    The check valve would do essentially the same thing as shutting off the water supply to the washing machine by preventing it from sending back pressure through the cold line. You would put it on the cold water supply side though, not the hot. Likely cheaper than a fill value, but I'd get one rated for potable water supplies. If @JimmyFix-it had made this an answer, I'd have up-voted it. – Comintern Aug 9 '14 at 22:32

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