Furnace Repair Ameren Red Tagged due to gas leak at gas valve Conducted a very thorough leak search for gas. Did not find any signs except for the outlet port where we Check gas pressure was slightly loose. Enough that a meter used by Ameren could’ve picked up some gas. Tightened and verified operation of system. Performed maintenance on the system to check safety and functionality. Tested CO detector, it had a dead battery. Replaced and verified operation. System is operating normally at this time. We will continue to monitor. System Needs new filters ASAP.