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Heater not working until high revs
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will6440
 


Member Since: 12 Oct 2017
Location: Camberley
Posts: 9

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Baltic BlueDiscovery 4
Heater not working until high revs

Hi all,

New owner here (if fact I bought it today)!

It's a 1 owner from new, full service history motorway muncher. It's a 2012 model with 140k on the clock. I know that's high but it's been exceptionally well looked after by all accounts...

On my journey home from Nottingham it felt a bit cold in the car, so I turned the climate control up. After about 15 minutes I noticed the cabin wasn't getting any warmer... even on 'hi' i was getting no heat out of the vents. Temperature gauge was reading bang in the middle and engine is up to temperature. To cut a long story short I discovered that if I revved the nuts off the engine the heater would blow warm, although not exactly hot!

So to sum up, no heat at idle or low revs and some heat at high revs. I'm thinking it's an airlock somewhere in the heating system? I've searched high and low to see if there is a way of bleeding it but can't find anything.

Would really appreciate some advice...

Thanks!
  
Post #186795412th Oct 2017 8:32 pm
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tayaste
 


Member Since: 15 May 2013
Location: Chester
Posts: 6851

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Have you checked your coolant level?
   
Post #186795912th Oct 2017 8:45 pm
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will6440
 


Member Since: 12 Oct 2017
Location: Camberley
Posts: 9

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Baltic BlueDiscovery 4

Just checked it and it is a little low although maybe only by a pint or two. Would that make a significant difference?
  
Post #186796412th Oct 2017 9:05 pm
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Bodsy
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Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 20794

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Ive heard some D4's having a nightmare airlock, where you have to try to put the car at 45degrees and rev it to get the airlock through.
 Bodsys Brake Bible

D4/D3 Remote FBH heat kits
BAS Remaps/ EGR Blank
Transmission Flush
Software updates/enabling


Clock/ SNOTM /3Flash / 4x4Info /BT Update /Service Reset/Error Codes / Gearbox Reset
See It Here 
 
Post #186796812th Oct 2017 9:34 pm
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timmos
 


Member Since: 01 May 2017
Location: burton on trent
Posts: 2


did you ever find out what it was?
  
Post #18751832nd Nov 2017 9:51 pm
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