It probably had the problem when you bought it and only became apparent during service. If you bought from a dealer then:-

"The amendments to the Sales of Goods Act (EC Directive 1999/44/EC) that came into force on 31st March 2003 now place the burden of proof on you ‘the car dealer’ for the first six months after a purchase. ...

here we go this may help

http://www.honestjohn.co.uk/forum/threads.htm?f=2&author=&model=&subject=in+car+camera&q=&days=0...

Taxi driver with 2008 Mk2 Octavia.My 1.9tdi HAS surprisingly improved on fuel economy .7p/litre more than normal but definitely worth it with the many short trips around town & stop/start driving.

I can now update on my situation. We did not sign any paperwork with the Dealer to authorise them to sell our car on our behalf. We did not leave our vehicle with the Dealer on a Sale or Return basis. The Dealer arranged finance on our car with a well known finance company and they were paid the money by the finance company. The Dealer then ceased trading. We knew nothing of the transaction having taken place until we went to sell our car and there was a HPI note of interest placed on our car by the finance company. We went to the police who informed us that we had not suffered any loss we had the 2 sets of keys the car and the V5 so therefore no fraud had been committed. 1 week later we were served with court papers the finance company were claiming title to our car. We then entered into lengthy court proceedings which cost in total £9,500 two days before the court was due to hear evidential evidence the finance company offered us £5k for our car on the condition that we paid our own expenses and they paid theirs we refused. They increased their offer to £10k then £12k then finally £14k again on the proviso each party paid their own expenses. They initially paid out £23k on the car to the Dealer they were now offering us £14k so in total they were paying out £37k on a car that showed a book value of £17k and they had their own fees to pay we estimated in the region of £6k making a total outlay of £43k. We accepted their offer based on the fact that we had already paid out £9,500 in solicitors fees and stood to pay if we lost the court action another £10k as well as their fees of £6k total we stood to loose £25,500k. I am disgusted that the finance company Santander Consumer Finance took this matter as far as they did hoping that we would crumble and walk away we would have loved to go the whole way with this but the effect it has had on my wifes health and the stress we have both suffered during this 10 month ordeal has been immense. A word of warning to others the finance company will try to use bully boy tactics they will also hope that you will not fight your corner. Please do not leave your car with a garage on a Sale or Return basis despite the fact we did not do this they tried to say we did and in the end when we could prove that we did not they did not have a case but in civil law it is based on probability. Tony G I can assure you that the figures I quote are indeed accurate and yes everyone we tell our story too can't believe how something so clearly fraudulent could take place and the finance company would come after the person who has nothing to do with the transaction but we all know wny it's because they had no one else to go after to try and get the money back they had foolishly paid out to a rogue dealer....

Tried removing the 2 pin plug no improvement. The heater matrix has been flushed and is clear also when engine warms up and heater motor not switched on both inlet and outlet of matrix are very hot but when heater motor switched on it looses its heat very quickly