Mine isn't terrible, it's not freezing, just at times I feel the cooler air.
I don't know if mine has the outside temperate problem too, it seems to be about what the BBC Weather App says.
I'm just a stickler for detail and things being right, hence wanting to look into this. The humidity sensor probably will make no difference to this issue or, anything else, but I know I'll end up replacing it at a cost of circa £100 unless I can find a used one. so far, no luck on that one.
I'd like to attack the interior sensor issue, does anyone have a thread with pictures of dismantling that part of the dash and the procedure?1998 Defender 110 TUM HS FFR Hard Top XD WOLF
2016 Discovery 4 HSE
1982 Series 3 2.25 Petrol Hard top- Oscar, as featured in Classic Land Rover Magazine for 7 months
26th Feb 2024 6:20 pm
Lrstaylor
Member Since: 03 Oct 2018
Location: Kent
Posts: 616
You flush the heater matrix from the engine bay I did our d3 due to cold passenger heat 15 min fix I see if I can find my post here is my DIY flush kit
26th Feb 2024 7:10 pm
RRUK Site Supporter
Member Since: 16 Aug 2005
Location: UK
Posts: 676
Thanks but I'm told it's not the same on the D4 and the dash has to come out to access it.1998 Defender 110 TUM HS FFR Hard Top XD WOLF
2016 Discovery 4 HSE
1982 Series 3 2.25 Petrol Hard top- Oscar, as featured in Classic Land Rover Magazine for 7 months
27th Feb 2024 9:50 am
Gary_P
Member Since: 03 May 2016
Location: Kent
Posts: 1660
Which may well be at least part of the reason it doesn’t work ….Gary
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Discovery 4 HSE 2016MY
27th Feb 2024 10:30 am
darrind
Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2889
Not sure if its any benefit but if the passenger side dial is set to a lower temp than the driver side on my D4 its always cold on the driver side, if the passenger side is as high or higher the heater works fineMust stop buying shiny toys....
27th Feb 2024 4:38 pm
RRUK Site Supporter
Member Since: 16 Aug 2005
Location: UK
Posts: 676
Good to know.
My dials are always the same1998 Defender 110 TUM HS FFR Hard Top XD WOLF
2016 Discovery 4 HSE
1982 Series 3 2.25 Petrol Hard top- Oscar, as featured in Classic Land Rover Magazine for 7 months
27th Feb 2024 4:41 pm
Gary_P
Member Since: 03 May 2016
Location: Kent
Posts: 1660
Thanks. Yes mine are always pretty much the same. I believe the handbook day that a temperature difference between the two dials of more than 3 degrees cannot be maintained.Gary
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Discovery 4 HSE 2016MY
27th Feb 2024 4:43 pm
Lrstaylor
Member Since: 03 Oct 2018
Location: Kent
Posts: 616
RRUK wrote:
Thanks but I'm told it's not the same on the D4 and the dash has to come out to access it.
You don't need to remove the dash you access the heater matrix coolant in/out pipes from the engine bay same as the d3. Just have a look see left rear side of engine compartment . You just pop off the hose clips connect flush kit flush matrix reattach hoses ...job done.
29th Feb 2024 10:22 pm
RRUK Site Supporter
Member Since: 16 Aug 2005
Location: UK
Posts: 676
Yes but this is a D4 and the thread is about the issue in the D4!1998 Defender 110 TUM HS FFR Hard Top XD WOLF
2016 Discovery 4 HSE
1982 Series 3 2.25 Petrol Hard top- Oscar, as featured in Classic Land Rover Magazine for 7 months
4th Mar 2024 6:09 pm
Lrstaylor
Member Since: 03 Oct 2018
Location: Kent
Posts: 616
D4/D3 suffer the same blocked heater matrix issue and both can be flushed from the engine bay. I am aware its a D4 issue....its nothing special just a D3 dressed up and engine changes
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