I just had someone come out to do a Fall tune up. They told me that it appears that my heat exchanger is bad ... showed me a tape with "XAIR % = 137.5" to justify that. They had just put in a blower motor a few days ago and offered to replace the furnace and give me credit for the blower repair. The guy doing the blower motor repair did not have testing equipment with him on that day.
The outside condensor unit is only 5 years old (15 SEER with the new refrigerant) and I was hoping to get a few more years out of the furnace and then change both units out with a new system downstream.
Does it make sense to do a heat exchanger repair in my case? Is it under warranty with Lennox still after 13 years? I was told that it was not. But I see that on the new system offered to me that the Heat Exchanger warranty is 20 years.
Looking for some good advice from an expert.