Arrived onsite to investigate insufficient hot water on an electric water heater. The water heater was replaced in November 2024. I inspected the unit and found it to be operating properly. I checked the sinks and verified adequate hot water at 116°F. The shower hot water temperature measured 105°F, indicating an issue with the shower valve. I recommend replacing the shower valve cartridge. The required part was not available on my van, so we will need to return. We will call to schedule a follow-up appointment.