So I have a Mr Buddy Big Maxx heater in my garage. Has a C, W, R and G wire. It's been working fine on a 2 wire setup with a manual thermostat, as well as a honeywell programmable digital thermostat, so I know the heater works. I hooked up the Nest E thermostat, and nothing......C wire has 24.5V, the nest powers up, but won't call for heat. I checked the LED indicator in the heater and it's functioning, just no call for heat.
I've tried everything I can think of, to no avail....how do I get this thing to function?
