Customer called in about shower only going to tub spout, not the shower head. Also hot water pressure very low. Upon further diagnostics, determined that we need to rebuild shower valve. Did informed customer due to the age, finding the parts maybe a challenge. Customer understood. Was able to replace hot and cold stems. Diverter is on order and once delivered, we will need to comeback and replace diverter. Hot water pressure improved a little but issue will lie in the water line itself. Do recommend replacing galvanized lines down the road. Scheduled furnace check up next Tuesday.