Our service tech told me that the Lennox G12 has a history of cracked heat exchangers? I don't know if this is only the 60,000 btu model or if he meant other nodels as well. Have any of you experienced this?
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Has anyone had an occurrence of a Laser 730 or 731 over firing?
The top of the heat chamber and the heat exchanger glow red on high when this occurs....
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