Vehicle & Technical > Defender

Heater Matrix - defender 90

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Landy Andy:
Don't know age of yours, but mine is 04reg and standard heater is fab, even the wife tells me to stop the heat! But you get very clear thud wen you push lever to hot so i do know flaps are well set up.
You can get  it on some that have done lots of offroading that the matrix becomes blocked with mud and debris? Just a thought

Andy

Litch:
The cable-outer moving with the inner is very common and is exactly what causes the flaps to go out of adjustment and make the heating inefficient.
Lubricate the inner and make sure the outer is securly clamped, that should make it work correctly. If you get someone to operate the levers and you get your head down to the dashboard you will be able to hear when a flap is fully closed (closes with a nice thump!), adjust the cable until all is well and you should be there. You have the dashboard vents and also the air inlet flap behind the heater itself, the latter is the most important because if you are not shutting off the cold-air then the cab will never get hot no-matter how hot the heater-matrix is.

Mrchris:
Thanks all i have a play with what i got and see how it goes.......used to be ok untill i went waiding in some very muddy tank tracks!!

Probably just blocked up or dried out the cables!!

Cheers

muck_truck:
Your heater matrix may just be passed its best if its a older one.  My heater wouldnt get warm so i took the matrix out (origonal LR alloy one i thimk?) filled it with hot water and it would only be hot in a couple of patches so was obviously blocked up.  Tried to unblock it but was more hassle than its worth.

Replaced it with a new one (replacement one was copper) and it now belts out heat.  :D

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