Pride Plumbing was called out to investigate a mixing valve only allowing lukewarm water to two rooms. We went through and shut off the mixing valves one by one and isolated the issue to one of the rooms. It was our belief that at this room's kitchen sink faucet, when all other fixtures were cut off, it would cause the water to temper to around 79 degrees. The faucet was also loose and it's cold-side water supply stop would not cut off all the way. The customer opted to allow their building maintenance to replace the faucet and water supply stop.