well i did it --- while getting ready to leave these minus temp in Ontario, i changed over the regular therm to a digital one --- it was an easy process and well the furnace works great --- the air conditioner fan hums low and high.
its currently frozen so didn't leave it on for more than a couple of sec to make sure that it could hear the difference between high an low to make sure it was wired correctly.
left the furance on last night -- as i had recaulked the shower --- and this morning the trailer was nice an warm --- no too hot or too cold.
seems to have been a good modification --- additionally, the temp reads the same on the digital therm as the smaller taple top thermo that we have - nice!
so, that being said - if you have not changed it over --- do so -- the directions on her are great!!!!!! thanks fo the help!