IS220D climate control — passenger side no heating

[Shahid]

Hi, I bought IS220D couple of months ago, drives beautifully, but the climate controls is not working properly: the passenger side blows normal air regardless of temperature setting and mode. I had the same issue with my Avensis 05 model, changed the climate control ECU, and it worked, so I bought a used climate control ECU for Lexus , fitted in, now both sides have no hearing at all. A/C works and blows cold air on both sides but with same temperature regardless of any setting. Any advice would be very much appreciated. Thanks