Customer called in because water heater we installed on 12/2/22 was not heating properly. Checked temperature at nearby faucet. Temperature at approximately 107F. Shut power off to unit. Removed top and bottom panels. Adjusted temperature. Returned power to unit. Checked incoming power. Sitting at approximately 240V. Checked amp draw on top element. Sitting at approximately 19. Checked amp draw at bottom element. Sitting at approximately 19. Took water temperature. Temperature at approximately 128F. Adjusted temperature down.