[77newell]

My 93 has all new thermostats compliments of Forest (or is it Forrest - dang, I can never remember, but he is a really good guy however it's spelled). They all can do auto or continuous and all work that way. I have nothing that tells me the logic of the circuits so I'm disabled from giving you a troubleshooting tip other than swap the one that isn't working with one that is working and see what happens, does the problem follow the thermostat or stay with the fan. Since these are fairly simple units (ain't nothin on my Newell that's truly simple) I would not be concerned that the swap will mess things up further.