Service for no hot water: Arrived to the customers home. Customer states that they run out of hot water in their tub shower. Hot water is available throughout the house. Told the customer that the cartridge needs to be replaced. Did not have part in the truck, went to the supply house to look for one but was unsuccessful. Managed to get them some hot water that is tolerable. Ordered part and it will be arriving to their home. Leak under kitchen sink. Missing washer on trap. Tightened the nuts and checked for leaks. Customer says there is not heat in the downstairs zone. Checked the thermostat and the zone valve. Checked the wiring. Told the customer that I could replace their zone valve and did so. There were still some issues with the connection. Did not have any thermostat wire in the truck. Wired the 2 zone valves together. Upstairs thermostat opens both zones now. Told the customer that they need a new thermostat wire for downstairs. Only charged 200 for the zone valve since it di