Install new snap disc limit L180F-40. Recommend performing preventative maintenance on the nordyne furnace once repaired. 11/18/22-PT- upon arrival the homeowner stated that the system worked perfectly last night. I powered the system down and removed the access panels. I removed and replaced the old limit switch and made all the proper connections. I tested the system for proper operation and the system started without any issues. I powered the system back down and performed preventative maintenance. Gibson furnace model #Kg7sa108c-35c1, serial #Kgg150444890. I removed and cleaned carbon off of the flame sensor and cleaned out the burners and burner box. Checked the pressure switch for clogs checked all electrical connections to ensure that they are secure and in good condition. Replaced the air filter size 16x25x1. The blower motor and blower wheel are clean and in good condition. I powered the system back up and called for heat. I took a combustion analysis test and received the f