Nest E wiring

[markhark68]

please help????

Attached are pics of current wiring and i cannot determine where the blue wire goes

[markhark68]

Any Ideas? Would love to get this working before it gets cold.

[Patrick_Caezza]

@markhark68 

Can you post a picture of how the terminal block in the Furnace/Air handler is wired?

[markhark68]

I don't have it on my phone and it is my sons house and I am not there. I can get a pic but it may be a day or two. It appears to me the blue wire should be used as the reversing valve wire for the heat pump. It just doesn't seem to switch to cooling when you set it to cool.