Renewed the Comfort Club Membership and completed 2 heating preventative maintenance checks. Found the upstairs furnace operating normally and within manufacturer specs. The flame sensor is weak. Suggested to replace it and suggested to install inline water protection. The customer declined. Found the downstairs furnace operating at only 88% efficiency. The inducer assembly is making a noise and high at amp at 3/2.8 rating. It could overheat. The customer wants to keep checking on motor. Found the flue pipe leaking water. Added more pvc glue to help stop the leak. Both systems are operating at this time. Changed both filters that the customer provided. Suggested an APCO air purifier to improve air quality.