Arrived to remedy a thermostat that won’t connect to Wi-Fi. Went through the normal steps to get it connected with no results. Reached out to Lennox tech support for assistance. Determined the thermostat is working properly but the T-Mobile router is not allowing connection. With the homeowner called T-Mobile to get help connecting to the homeowners router. T-Mobile stated they don’t have control over the router to deny or allow access to the homes Wi-Fi. At this I have verified that the thermostat will connect to Wi-Fi just not through the router provided. While checking the thermostat wiring at the furnace, to ensure replacing the thermostat will go smoothly, found that the inducer for the furnace is leaking exhaust condensation. Spoke with homeowner about this and with homeowners approval performed a furnace maintenance. Checked the furnaces heat exchanger and found that it is also leaking flue condensation. With both of these items on the cusp of being failed enough to make the sys