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Auxiilary heater 2.7 diesel S Type 2006


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Had my 2006 2.7 diesel for 2 years now and never had a problem.

Cold in the winter and takes ages to warm up.

I didn't know it had an auxiliary heater until somebody told me recently.

I don't think mine is working or has worked since I've had the car because I have never heard it or seen any smoke coming from the front in the winter which I now believe is a sign of it operating in the winter.

Does anybody know how I can switch it on or check that it does work?

Has anybody else had a problem with theirs?

I would appreciate any help, thanks.

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Hi Keith,


P157 of the Owner's manual gives the information you need.


Assuming you have not got a manual I will give you a précis of what it says:




This aids in warming the engine and the car interior.

It is integrated int the cooling system and is automatically switched on or off depending on the coolant and the ambient temperatures while the engine is running.


It is possible that vapour may appear from the front of the vehicle for a short time plus a slight smell of diesel.


NOTE: The Auxiliary heater will not function when the climate control is switched off.'



I don't know how to check it or if it is working but I guess that if it isn't a message will appear.





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Yes I read that page of the handbook but  it doesn't give any details as to check whether it is on or not or any way of checking it.

Almost everybody that mentions them in the forums speaks of an obvious plume of smoke coming from the front passenger side of the car in the winter when it switches itself on.

One suggestion I had from elsewhere was to pull the fuse that covers the auxiliary heater while the engine is running then when its pushed back in the heater will fire up regardless of the temp, I tried that put it still didn't appear to be on.

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Hi Keith,


I have found that when the weather is cold the cabin will heat up quite quickly and the engine less quickly, but as soon as the cabin reaches the required temperature the engine quickly reaches its normal temperature.  This must indicate that it is working correctly,



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  • 1 month later...

I have the same year and model and the auxiliary heater has worked since I've had the vehicle, albeit, it was somewhat disconcerting when I first noticed it and was not aware why these plumes of blue smoke were appearing from the nearside wheel arch. 

However, in the last couple of weeks these diesel fumes have been finding there way inside the car, presumably through the air vents, which apart from being extremely unpleasant is not good from a health point of view.

Has anybody experienced this problem and/or know what the remedy is to prevent it happening before either my wife or I become asphyxiated

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Hi Alan, And welcome to the club.


I do notice the fumes but only for a second.  But I don't get the puff of blue smoke.


It could be the  vents that are opened, but basically I do not know.


I did have my car Terracleaned in the summer and it has made a difference, so it could be something in the fuel burning.





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  • 2 weeks later...

In order to stop the fumes entering the cabin, push and hold the recirculate button until it beeps twice then release, this will keep the flap closed until you push again or restart.  If you want to know any more information, I made another post under fumes entering cabin.

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