Village Plumbing was in Studio City we were called out for a bad flush valve. Checked and found bad flush valve…….removed and installed new one, found that the unit was filling slow. Removed and installed new fill valve too. Went out to Topanga Canyon to get numbers off a part so we can fix a customers pump. Then we headed out to Los Angeles, we returned to install circ. pump on system so that it would heat. Moved circ. pump back to location by cold main. Installed new check valve. In Glendale Village Plumbing had a TK2 heater not working. Checked and found had code. Removed burner and cleaned. Cleaned fan box. Replaced complete PC board. Tested working fine.