I changed my thermostat about 2 or 3 months ago following the sticky thread on here and after that my car got warm quick and the heating inside the car was fantastic. I took it in for a service about a month ago and ever since then it takes longer to warm up and the heating inside the car is poor once again. I noticed that the coolant had been changed as it was pink and came back orange, so I drained it all out again with what I had replaced it which before. I have also bled the system so there are no air locks. This has made an improvement but itís still nothing compared to what it was before
Has anyone got any idea what is up with it, itís the 1.9CDTI 150