I have a Lennox pulse manuf in 12/89 and according to Lennox, it does not fall under the recall on the heat exchanger. I have never had any problems with it other than sometimes it will come on for 10 sec and then shut off. I have not had it serviced in a while, so I am having someone service it soon. Per Lennox I am having the gas flapper and air flapper serviced, and pressurizing the heat exchanger to ck for leaks. Can anyone think of anything else that I should have done when the tech comes to service it?
Also, can someone give me an idea of how long this furnace might last, and whether it is worth keeping it? I have kept the air filters changed religiously.