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Sk1ppy

Member Since: 19 Dec 2022
Location: Newbury
Posts: 20

Heater always hot!!

Hi

I’ve had a little search but can’t find anything… but I’m still pretty new to the forum! So apologies if this is a common question. My 2.4 90 has been parked up at the garage for the last 6 weeks (don’t ask!!) and on the journey home today I couldn’t get the heater to stop producing hot air. Adjusting the temp dial only made minimal difference. Any suggestions on where I should start to look tomorrow?

Thanks all.

24th Mar 2023 7:46pm

RobKeay

Member Since: 19 Jul 2009
Location: Stafford
Posts: 1596

2014 Defender 110 Puma 2.2 USW Corris Grey

Open the bonnet and check the heater cables on the heat matrix. It’s on the passenger side of the bulkhead. Mine needed some wd40 and worked fine after.

24th Mar 2023 7:56pm

seriesonenut

Member Since: 19 Nov 2014
Location: Essex
Posts: 1251

Mine did just the same, I worked out it was not shutting off (moving to the right as you look at it from the open bonnet). Only by a tiny movement but it just kept the heater hot. I re set the cable at the heater valve end and it has been fine since. 1984 One-Ten CSW
2010 XS USW (sold)
1957 Series One 88 diesel
1958 Series One 88 4x2
1990 Defender 200tdi CSW (sold)
1989 Land Rover Ninety (sold)
1998 Discovery 2 (sold)
1995 Discovery 1 (auto) (sold)
1990 Discovery 200tdi (sold)
1987 One Ten CSW turbo diesel (sold)

24th Mar 2023 8:38pm

bear100

Member Since: 22 Mar 2010
Location: South Wales
Posts: 2027

2010 Defender 110 Puma 2.4 USW Santorini Black

Had some similar issues myself
Sometimes they would stay hot
sometimes one side would be hot the other cold
I found fitting a spring to the manifold helped somewhat
I’ve ordered a replacement manifold to try try
There’s quite a few that are the same eg Peugeot and Citroen etc 2023 Defender L663 V8
2016 Range Rover Autobiography 4.4 TDV8 (gone)
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)

24th Mar 2023 9:33pm

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