Member Since: 04 May 2013
Location: Bristol
Posts: 97
MY12 D4-HSE poor heater performance below 3 degrees C
Hi,
Now that we're getting cold weather I've noticed the heater is struggling to deliver hot air. The engine temp gauge is normal and comes up normally and the FBH works as it should.
Never noticed this on my MY06 D3
It struggles most when cruising on motorway or above about 60mph. When you slow up or stop at a junction the heat improves.
IIRC it doesn't fire up is your fuel level is below a certain level.
NJSSAm I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
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19th Jan 2016 3:42 pm
JackNorris
Member Since: 06 Jul 2012
Location: Beds/Bucks Border
Posts: 1879
I seem to remember reading somewhere that the fuel type only goes down to the quarter point in your fuel tank
19th Jan 2016 3:49 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Checked the thermostat?Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 04 May 2013
Location: Bristol
Posts: 97
FBH is working perfectly.
I haven't checked the thermostat yet because the engine appears to warmup normally and hold the normal temp as usual.
I wanted to get the feedback form the forum to see if weak heating is a common concern or there's a common failing component like the thermostat or other bits of this complex plumbing system before pulling things apart.
19th Jan 2016 5:26 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Don't trust the dash temp gauge. Either use a diagnostic tool or an IR thermometer on the pipes and radiator.
Land Rover - Turning Drivers into Mechanics Since 1948
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