@TP-Link thank you for the quick feedback. I had already tried to reset the 4220 so am now asking the seller for an exchange.

@TP-Link hi !! I tried this and it still fails to pair, it looks as though the extender fails to go into the pair mode.

Hi All, I just purchased this extender kit to run alongside my existing TL-PA4010 network (x4) as I need to improve my wireless signal upstairs. After connecting the extender (TL-WPA2020) and new...