Client called with issue of lack of hot water. They seemed to be running out of hot water too quickly within 10 min. We recently replaced the water heater back in June of 2025. No visible signs of failure on the heater at this time. We performed a crossover test and determined there was a crossover issue at the master bath moen shower valve. Replaced the posi-temp cartridge and tested for crossover again. After verifying there was no other crossover issues we ran the shower with a timer and exceeded 15 min of constant hot water delivery.