But I wonder if what he showed me really was the heat exchanger....can a camera can really be snaked up inside a heat exchanger?...or was what he showed me something else. I always assumed that a heat exchanger is a tremendously dense piece of metal and that you would not be able to "view inside it with a camera" only "view it from below with a camera". This same cavity could also be seen without a camera by looking into the furnace with flashlight (he had removed one of the panels above where the burners are) What he showed me was was a vertical cavity which had a couple of bulges on the sides of the cavity which were bulging toward the outside. Is that really the heat exchanger he showed me? What does the heat exchanger on a 20 Yr. old Carrier furnace look like and exactly where is it located?
There is also some rust present on the inside of the furnace.
The burners look like they produce a nice blue flame.
The technician is recommending a new furnace based on the age and based on the bulges and rust. Do I really need to be seriously thinking about getting a new furnace at this time because of the rust and bulges, or is it possible this furnace could last several more years? I believe they recommended a new furnace 3 years ago when I moved in although I don't recall anyone showing me the bulges before, but I'm suspecting they could have been present 3 years ago too.
BTW, the company I've been using prefers to install Goodman systems, although they would also be willing to give me a price on another brand that I have in mind which is Carrier. They say that they will warranty both the parts and labor for 10 years on the Goodman, but the warranty on the Carrier would depend on what their warranty is. Is a Goodman likely to last as long as a Carrier?