Hello, I have already searched the whole forum here, I have also partly found some questions but still n few questions. I have so n Laguna Grandtour 1.8 90 HP BJ: 1996 with air conditioning automatic which does not heat. I have already changed the blower engine because it was def.. then determined that the temp. display was always relatively far down – so – thermostat replaced, the result: engine is warm but it does not heat. Now I wanted to flush the heat exchanger here in the forum, But I can’t get the hoses off the spray wall. This funny blue spanner or lever doesn’t seem to have a real function and I couldn’t discover a hose clamp or the like either. So, there must be some trick there is always talk of a quick coupling!? Furthermore, I find it funny that the two hoses in the interior are hot on the heat exchanger. If the swapper was tight then the process wouldn’t have to be cold? ngen should, can tell me. someone if there are different heat exchangers (with & without climate), would then buy me a new one and change it. OR can there be another problem there why the stupid car does not heat??? Thank you already for your help!!!