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?