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lightning



Member Since: 23 Apr 2009
Location: Stockport
Posts: 468

United Kingdom 
TD5 Defender heater fault

My heater has developed a slightly unusual fault, it works fine but will only give cool air from the passenger side footwell.

In the warm setting it’s cold, and on hot it’s just warm. The screen vents are fine on both sides, as is the driver’s side footwell. I’ve looked online and others have had this fault, but nobody’s posted a solution.

Any ideas as to what needs doing to it?

Post #757940 11th Feb 2019 1:15pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 3732

2006 Defender 110 Td5 USW Zermatt Silver

Odd.

First things to check would be coolant level, and that heater cable is fully pulling the hot/cold lever over.

Post #757942 11th Feb 2019 1:25pm
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lightning



Member Since: 23 Apr 2009
Location: Stockport
Posts: 468

United Kingdom 

That’s all fine.

The heater works fine through the driver’s footwell outlet, and both screen vents.
It’s just the passenger footwell.

Post #757947 11th Feb 2019 2:00pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 6743

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey

That suggests a problem with the mechanism within the plenum (the lower part of the dash) that diverts air to the footwell vents. It's cable operated by one of the heater levers but ISTR there's rod that links the two vent flaps, so perhaps that's come adrift at one end. Darren

2013 Defender 110 USW XS
2013 Discovery 4 XS

"You came in that thing? You're braver than I thought!" - Princess Leia

MY 110 USW BUILD THREAD - MY 200tdi 90 BUILD THREAD - Instagram: @landroveranorak

Post #757951 11th Feb 2019 2:08pm
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lightning



Member Since: 23 Apr 2009
Location: Stockport
Posts: 468

United Kingdom 

Sounds like a likely reason

How do l get to these parts, can it be accessed from inside or do l have to take out the heater from the engine bay?

Post #757956 11th Feb 2019 2:28pm
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OsloBlue



Member Since: 14 Jul 2018
Location: Essex
Posts: 574

United Kingdom 2003 Defender 110 Td5 XS CSW Oslo Blue

Thermostat? I'm on IG: https://www.instagram.com/osloblue42/
Defender Drag racer & achiever of "How is that possible" speed
Current: TD5 '110 "Lucinda" Thread here: https://www.defender2.net/forum/topic62562.html
Previously: Disco 3/4 2010 Manual, BMW 325D SE, '08 Nissan Pathfinder, '08 Nissan Navara, '08 Focus ST, '97 Vectra track car.

Post #757960 11th Feb 2019 2:58pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 6743

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey

lightning wrote:
Sounds like a likely reason

How do l get to these parts, can it be accessed from inside or do l have to take out the heater from the engine bay?

They're within the lower part of the dash, so it's necessary to dismantle the dash enough to gain access. I couldn't tell you how much, off the top of my head, but I suspect that it's 'most of it'. Darren

2013 Defender 110 USW XS
2013 Discovery 4 XS

"You came in that thing? You're braver than I thought!" - Princess Leia

MY 110 USW BUILD THREAD - MY 200tdi 90 BUILD THREAD - Instagram: @landroveranorak

Post #757963 11th Feb 2019 3:12pm
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