Maintenance call on two 2020 Lennox high efficiency furnaces. The systems are in good shape but the downstairs system has a leak on the exhaust and it’s leaking condensation back onto the furnace which has lead to the cabinet starting to rust. There was also oil leaking off of the liquid refrigerant line indicating a refrigerant leak. The upstairs heat exchanger has a line around one of the rings that hold the heat exchanger together than will need to be monitored moving forward. The systems are running and heating as they should here today and ready for the winter months ahead.