I'm jt curious what would happen if someone put series 2 pods on a series 1 with the series 1 air con ecu thingy? Would they still work etc?

Yes still works but the readout goes to pot lol. And you wont get the features without the ecu.

My read out looks fine, how would I check if it's the right ecu?

I'm just curious, I don't think I have the wrong one lol

If you are using a series 2 air con pod, ie pic of the seat in the window, with a series 1 ecu you will not get the ambient temp figures in the window, just some dashes.

 

Series 2 pod and ecu, you will get a pic of a fan in the window and direction, when pressing the buttons along with the temp figure, but no second digit ambient temp figure.

Here ya go:

 

Without doubt you have the series 2 aircon pod and ecu lol