It would help if you would put an explanation of exactly what this thing does. I have had one of your furnaces since 2002. It has worked well, though I did upgrade ours with the 165K BTU option from LDJ ( yours was not yet available and NW WI winters made this mandatory for our house) This setup has been working well, but is is and inexact science to set up a perfect burn when using a thermostat and varying out side temps. To make it worse. work takes me away from home for a week at a time on occasion and I'm sure my wife does not even try. This gives me no end of worry while gone. Could you post exactly what this thing does and what it controls. Your website has a brochure, but it does not have a single detail. A install, operations manual would be a nice start if available in digital format.

Thanks

Kevin