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lightning

Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2942

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?

11th Feb 2019 12:15pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5804

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.

11th Feb 2019 12:25pm

lightning

Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2942

That’s all fine.

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

11th Feb 2019 1:00pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

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

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

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

11th Feb 2019 1:08pm

lightning

Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2942

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?

11th Feb 2019 1:28pm

OsloBlue

Member Since: 14 Jul 2018
Location: Essex
Posts: 825

Thermostat? I'm on IG: https://www.instagram.com/osloblue42/
Current: TD5 '110 "Lucinda" Thread here: https://www.defender2.net/forum/topic62562.html

11th Feb 2019 1:58pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

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

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

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

11th Feb 2019 2:12pm

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