Replaced cold water intake valve. First I was able to tell which valve was making the noise (hot or cold) by putting a finger on the valve while it was making the noise. I watched one of your videos about the replacement process. It was very easy. Just be careful when taking off the fragile electrical connections. I used a flat tip screwdriver blade of the right withe to lightly start prying the wires off AFTER I removed the valve. Otherwise very simple.