2021 high efficiency carrier gas furnace paired with 2021 water furnace single stage 5 series split Geo. Geothermal is running in very good condition and heat mode. No service code since last spring service, test run heating mode at 110° Carry your gas furnace is also running an excellent condition in high stage heating producing 118°supply temperature. Resurface flame sensor and inspect ignition system Test run safety circuits in gas mode Replace air filter supplied by homeowners 20x25x4 Electronically inspect for combustible gases on gas line in mechanical room area ***A micro gas leak was detected at the Union fitting above the front of the furnace. Homeowner has been notified and will be contacting his own plumber. Photos of the exact location have been provided with this email receipt*** Homeowner has no concerns with the thermostat operation at this time