I'm assuming "G" on a thermostat is supposed to go to 24V AC when the heat kicks on, but it doesn't. When I'm at the thermostat and switch the fan on, then it reads 24V.
Regardless, the blower still turns on when the heating or cooling kicks on. But if one of those are already going and I turn "fan on" from the stat, the HVAC kicks into overdrive.
Any logical explanation for this?
Anyone know a good link where I can learn a little more in depth about the electrical workings of a typical residential HVAC system, i.e, Y, W, C, R, G? I understand their purpose, kind of, but I'm interested in the logistics. No reason in particular - just perpetually curious. Please don't tell me to go to a book store.