Member Since: 02 Mar 2022
Location: bulgaria
Posts: 6
No hot air / Engine temperature gauge dropping back to 1/4
Hello everyone, new 2007 TDV6 Disco3 owner here.
My cabin is not getting any hot air (with or without AC) even when I put it on maximum heat.
If I have a long descent without using much throttle, the engine temperature gauge drops back to the 1/4 position.
Pretty sure it's the thermostat being stuck open but is there any way I can double-check before buying parts?
And can you replace just the thermostat? Or do you have to replace the thermostat + housing?
22nd Mar 2022 9:43 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8227
More than likely an air lock in the system
It can when others can't,
It will when others won't,
It goes where others don't.
22nd Mar 2022 6:46 pm
defector
Member Since: 23 Feb 2009
Location: Greater Manchester
Posts: 1471
Sounds like thermostat.
The thermostat is a one piece housing.
As yours is an 07 (Euro 4) probably, there are two small thermostats in the EGR coolers and if they stick open then you get the same result as the main thermostat staying open.
22nd Mar 2022 9:12 pm
Disco3overlander
Member Since: 02 Mar 2022
Location: bulgaria
Posts: 6
M3DPO wrote:
More than likely an air lock in the system
Thank you very much! I'm going to try this today. Very new to the LR ownership, so very grateful for the advice guys!
23rd Mar 2022 8:32 am
Disco3overlander
Member Since: 02 Mar 2022
Location: bulgaria
Posts: 6
defector wrote:
Sounds like thermostat.
The thermostat is a one piece housing.
As yours is an 07 (Euro 4) probably, there are two small thermostats in the EGR coolers and if they stick open then you get the same result as the main thermostat staying open.
I got my EGR's removed and the LR specialist also remapped the ECU to prevent error codes. If the EGR's are removed, would the coolers still be there? Or are they a part of the EGR's themselves?
23rd Mar 2022 8:34 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8227
There is a difference between removing and blanking EGRs, it is usual to blank not remove when having a remap It can when others can't,
It will when others won't,
It goes where others don't.
23rd Mar 2022 12:18 pm
Disco3overlander
Member Since: 02 Mar 2022
Location: bulgaria
Posts: 6
You're right, my mistake EGR's have been blanked off instead of removed.
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EGR's have been blanked off instead of removed. 
