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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4932

United Kingdom 
Heater matrix
For some reason, my heater matrix seems to be stuck on warm, any ideas on that? I have gave the controls a spray down. I have gave the top wire a spray on the heater box too. But nothing, Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #776446 7th Jun 2019 6:08am
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5416

2006 Defender 110 Td5 USW Zermatt Silver
Disconnect the lever on the top of the heater box (under bonnet) and operate lever manually.

How does it feel?
Can you hear it move/close flap?
Does it stop the heat on test drive?
Post #776449 7th Jun 2019 6:46am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4392

United Kingdom 
As above. likely to be either a slipping cable or a broken cable.
Post #776452 7th Jun 2019 7:31am
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donmacn



Member Since: 07 Nov 2017
Location: Nth Scotland
Posts: 1829

... even a visual check? Note the position of the lever on top of the heater, move the cable, is the lever moving at all?

It's a really basic thing. I have some pics somewhere of a dismantled heater, which from memory shows how the lever/flap works - if that would be any use to you. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...
Post #776462 7th Jun 2019 9:21am
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Paddie42



Member Since: 24 Apr 2014
Location: Hamphire
Posts: 230

England 2003 Defender 110 Td5 SW Belize Green
I had a similar issue where is was very stiff to move the selector.

I removed the cable from the lever ontop of the heater box in the engine bay. Where the cable joins the lever there is a joint that should move so that the cable is always in the correct position to the heater matrix. This was very stiff. Some 3-in-1 oil and a little patience got this moving again.

The cable was also a little stiff, so some 3-in-1 on that helped as well.

I hope the above makes sense. Happy to take picture if it helps.
Post #776483 7th Jun 2019 12:01pm
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4932

United Kingdom 
yeah lads get me some snaps, just so I have a good idea on what why and when, The old landy was spot on, but this one seems to be on constant warm or hot. Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #776513 7th Jun 2019 4:09pm
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4932

United Kingdom 
I gave this a spray down and looked at the control on the heater box itself, on cold its pointing horizontal, then it moves to the driverside for the hot air, so I am suspecting something not right there. Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #778463 21st Jun 2019 9:24pm
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donmacn



Member Since: 07 Nov 2017
Location: Nth Scotland
Posts: 1829

Hey mate,

I mentioned pics a while ago - and then forgot Big Cry

I haven't got them here at the moment, but I did post them on this thread: https://www.defender2.net/forum/topic60066-30.html

If you can, have a look and see if that helps?

The flap in the box isn't sprung at all, so any movement will be coming from the cable. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...
Post #778468 21st Jun 2019 10:25pm
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4932

United Kingdom 
its moving, I am suspecting that the cable is seized. I will have bum up to my dad with his, just in case, mine is ok, and there is something else wrong Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #778515 22nd Jun 2019 3:52pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5416

2006 Defender 110 Td5 USW Zermatt Silver
You have previously mentioned that the spacers were missing from the in cab controls. Did this bend / kink the cable too tight? Maybe worth disconnecting both ends of the cable straightening as much as poss and work it back and forth.
Post #778517 22nd Jun 2019 4:14pm
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Procta



Member Since: 04 Dec 2016
Location: Sunderland
Posts: 4932

United Kingdom 
you know something, now that you mention it, I think I will buy the proper spacers and a new cable, in case that's been damaged as you say. Thumbs Up Defender TD5 90 ---/--- Peugeot 306 HDI hatch back

Success is 90% Inspiration and 4 minutes Preparation # you can make it!
Post #778521 22nd Jun 2019 4:55pm
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