One of my two Maple Chase thermostats displayed 'Lo Bat' after changing the batteries. I attempted to reset by pushing the odd looking button under the cover per similar questions and answers here but nothing happened. The button doesn't seem to move. Is there another way to reset?

I had the exact problem you mention on my Maple Chase 0960T-01, and pushing the tiny round black button near the bottom left of the undcoverd thermostat worked for me.

BTW, I want to thank the other posters on similar threads that pointed me to this button. You helped save me lots of hassle and potential expense in having to call someone to figure this out!