Hey Guys,

I just installed a 3rd gen Nest thermostat, On the original thermostat I had the
red wire connect to the R
Green wire connect to the G
White wire connect to the W
Yellow connect to the O

There is a second thermostat on the 2nd floor that looks like one red cable that is a jumper between the rc and rh I believe, itís not operable as it canít control the thermostat

When I installed the nest I connected all the wires the same except for the yellow wire which I connected to Y1

In the fuse box I have the a/c and the air handler.

After installing the nest I canít turn off the fan once I turned it on or even change to heating or cooling

Anyone have a idea on why this is happening, the only way I can turn off the fan is turning the air handler off