Volkswagen Transporter t5 - car not maintaing heat

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Wed 7 Oct 2015 15:49
Volkswagen Transporter t5 - car not maintaing heat - fintant5

my 2005 1.9 tdi transporter is blowing hot air while driving but once the car is in idle it blows cold air until u drive on again. im sure its not the water pump, is there a sensor behind the tempeture control panel. or if anyone else has had this similar problen id appreciate the help to fix it.

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Wed 7 Oct 2015 18:10
Volkswagen Transporter t5 - car not maintaing heat - elekie&a/c doctor

There is no sensor behind the control panel.What makes you think it is not a faulty water pump?These are classic symptoms of a water pump impellor loose on the pump shaft.

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Thu 8 Oct 2015 13:31
Volkswagen Transporter t5 - car not maintaing heat - Railroad.

I'd say the water pump is the most likely cause. They are well known for the impeller to break away from the shaft, and when this happens this is exactly the symptom you will get.

Look on the bright side. It will do no harm to treat the vehicle to a new cambelt, and replacing the water pump will add only a few minutes extra labour. At least then your mind will be at rest.

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Thu 8 Oct 2015 20:38
Volkswagen Transporter t5 - car not maintaing heat - Cyd

Is this a sudden change when idling after driving or does it gradually cool down?

If the latter it might not be a fault at all. Diesels produce very little excess heat at idle. Have you compared it with other T5s?

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