Laguna 2 phase 1 Heater fault

Hey Everyone.



Bit of a odd one i have looked through all the other threads



on my laguna 2 2003 3ltr v6 i have a odd issue where the heater will eather be cold when on 16 degrees or hot when the temp gauge is set on anything other than 16 degrees???????



so bascilly it goes eather max cold or max hot nothing inbertween





any ideas?



Chris