u/thefucknut

Red line is hot and blue line is not. The slider is actuating the valve inside.

Could there be air or another blockage in the system? How much of a pain in the arse will it be?

Any advice is welcome, thanks in advance.

I'm sure you can guess which one is the new one

I need new clips for both the interior and exterior and not confident on which ones to buy (uk)

Thanks in advance