Brand new Nest thermostat. Original thermostat for heat only, has only two wires (Rh/W). Purchased C wire power adapter and wired everything up.
Getting an "Equipment Error N261". I go into the Wiring Info menu (which has a ! next to it) and I see:
C-W-R all in blue (assuming that means "good"?)
Power Connector menu item is enabled. Power Test shows Vin: 27.432 V, Iin: 164, PS: C-164, though if I go back to the "Nest Power Connector" menu item, it says "Power test not run".
What am I doing wrong here?
