Gdetrailer wrote:
Not sure if that T-stat is going to work very well on 12V.
Per the spec chart "24V AC with battery back-up OR 3.0V DC" it looks like the T-Stat uses the 24V AC coming from furnace transformer as the MAIN supply. The battery serves as BACKUP in case of power outages or long calls for HEAT on the furnace line (when T-stat calls for heat it basically shorts out the power the T-stat sneaks from the furnace).
I doubt that the life of the battery will be long if you don't have 24V AC coming from the furnace or T-stat may not even function correctly...
Just my hunch...
Hmmmm.... Looking at Mod 37 referenced in my initial post, I see
"Some residential thermostats use 24 VAC to power them. But if they have the battery backup feature, they can be used for RV 12-volt systems."I am hoping that this in fact the case.
