Heating system is useless

[MattA]

Ineos are working on a solution
See attached file from customer support

What date was that ticket and response given?
The system is the same now as it was when the vehicle was first released with no engineering / design changed so just wondering when the new ones will have a improved system

 

[River Meese]

The heating system in my field master has been rubbish from day 1
Now covered 7000 miles.
Car was delivered with a damaged water hose which was replaced by the selling dealer.
However they could not get the heater to blow anything other than cold air into the footwells.
Eventually went to another (service) dealer who did improve matters by bleeding the system
However the whole system is rubbish for a £70k vehicle

Ineos have admitted that the heating system is poor and suggest running in auto mode once you’ve got the car warm.
Even then my feet are always cold

They have accepted that it’s rubbish and a very basic design.

There are no plans to improve or modify it.

I believe it is not of merchantable quality and certainly not fit for purpose !!!

Really spoils an otherwise super 4x4

The heating system in my field master has been rubbish from day 1
Now covered 7000 miles.
Car was delivered with a damaged water hose which was replaced by the selling dealer.
However they could not get the heater to blow anything other than cold air into the footwells.
Eventually went to another (service) dealer who did improve matters by bleeding the system
However the whole system is rubbish for a £70k vehicle

Ineos have admitted that the heating system is poor and suggest running in auto mode once you’ve got the car warm.
Even then my feet are always cold

They have accepted that it’s rubbish and a very basic design.

There are no plans to improve or modify it.

I believe it is not of merchantable quality and certainly not fit for purpose !!!

Really spoils an otherwise super 4x4

The message from customer support was dated 15/8/25 with regard to the update to the heating system.

 

[CRH]

Just came across your post . I have also been told it’s a major design fault and nothing can be done . Mine has never worked since i got it and now it’s on 11,000m . I have resorted to buying a plug in one from amazon and that gives me hot air in cold weather . I can’t even sell mine as no one will touch these grenadiers , no dealer will put it on the floor and resale values have plummeted . They have mine back in the service centre trying to fix it again .

Your service centre is not fixing the issues. The heating will blow hot and cold if sorted. In-between settings and large and quick temp changes upset it.
Firstly, check the 2 expansion tanks for any signs of water leaking, if they are they need changing under warranty to get the system to work with the In-between temps. Check they are both topped up with coolant. Try doing the bleeding procedure that is available on here. Do this a number of times, after long runs and engine has cooled down. Make sure the refrigerant is topped up by dealer. If all this is done your heating will work. You may need to turn the aircon off at time s to get the mid temps when in auto or manual, sometimes you won't.

If you really want to sell, and i believe your selling issue is due to location from a dealer, i would contact Chester as they tell me they can't get enough second hand ones. But please try fixing first, saves loosing a lot of money and you will start to love it

The heating system needs to be treated gently when working, just one temp click change at a time and wait. If it insists on blowing cold on mid temp after a long spell of full heat, try a blast of full aircon cold and then turn aircon off for mid heat and use in manual.

Ultimately, the heating system should work, your dealer is just not doing their job

 

[LRNAD90]

Edit Fail..

 

[LRNAD90]

The message from customer support was dated 15/8/25 with regard to the update to the heating system.

And this didn't present in the Million+ miles of testing? They are just now 'looking for a solution'?

 

[Jeremy996]

And this didn't present in the Million+ miles of testing? They are just now 'looking for a solution'?

It will not be the first time issues came up when you had actual production vehicles vs the general public.

BMC Mini and leaks in wet climates
Rootes Imps not liking being stood for a few days
Ford Pintos exploding when hit from behind
Audi being a misguided missile when presented with pensioners

Much of the Grenadier heater issue appears to be there is not enough vertical space in the heater to bleed it easily and no way to move the body in white, too few temperature sensors and insufficient error trapping in the software. Only the last one is fixable cheaply.

 

[MattA]

It is kind of amusing though the fact that cars have had heating and cooling for a little while, well in fact well over half a century and put into millions of makes and models from around the globe.
Yet given that, we have people making excuses on why Ineos has a useless system that is so temperamental it’s laughable and so finicky to use people actually give advice on how to use the system when others dare mention what a failure it is.
I sincerely hope that the next model has a totally revised HVAC system and redesigned front drive shaft and diff