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Home > Technical > Strange heater issue on puma

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bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1923

Strange heater issue on puma Stumped with this one Travelling to the adventure over land show Friday, the further north I got the warmer it became, I put the heater to cold (air on is always on) but only the drivers side got cold the passenger air vents were still warm! The drivers side wasn’t really that cold either but significantly colder than the passenger side, turned the heater hot then cold but still a warm son in the passenger seat What can cause this? I’m sure it’s been mentioned before but I can’t find it another post 2016 Range Rover Autobiography 4.4 TDV8 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)

29th Sep 2019 6:44pm

mick Member Since: 08 Feb 2010 Location: Yorkshire Posts: 2109	Probably the valve sticking on hot under the bonnet
29th Sep 2019 6:47pm

bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1923	Hi Mick wouldn’t both sides be the same? 2016 Range Rover Autobiography 4.4 TDV8 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) Last edited by bear100 on 29th Sep 2019 7:07pm. Edited 1 time in total
29th Sep 2019 6:54pm

ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816

No, the Puma heater always provides more warmth to the left side than to the right side of the truck. That’s a heater matrix mis design issue. There is a LR fix for it, but that is a dash out job. Eric You never actually own a Defender. You merely look after it for the next generation. http://youtu.be/yVRlSsJwD0o https://youtu.be/vmPr3oTHndg https://www.youtube.com/watch?v=_GtzTT9Pdl0 https://www.youtube.com/watch?v=ABqKPz28e6A https://www.youtube.com/watch?v=rLZ49Jce_n0 https://www.youtube.com/watch?v=XvAsz_ilQYU https://www.youtube.com/watch?v=K8tMHiX9lSw https://m.youtube.com/watch?v=dxwjPuHIV7I https://vimeo.com/201482507 https://www.youtube.com/watch?v=ZSixqL0iyHw

29th Sep 2019 7:04pm

bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1923	not what I wanted to hear! Any idea on the fix ericvv 2016 Range Rover Autobiography 4.4 TDV8 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)
29th Sep 2019 7:09pm

mick Member Since: 08 Feb 2010 Location: Yorkshire Posts: 2109	Check the valve 1 st it’s easy
29th Sep 2019 7:11pm

bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1923

Sorry mick what am I checking for, just googled a picture is there a leaver or switch on the valve I should check for movement?  2016 Range Rover Autobiography 4.4 TDV8 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)

29th Sep 2019 7:16pm

mick Member Since: 08 Feb 2010 Location: Yorkshire Posts: 2109	https://www.defender2.net/forum/topic54969.html This it’s on a cable the butterfly sticks
29th Sep 2019 7:27pm

ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816

bear100 wrote: not what I wanted to hear! Any idea on the fix ericvv Here you go. Mind this is just the fix for the difference between left/right side heater output. Nothing to do with a stuck valve not allowing fully cold air. Eric https://www.defender2.net/gallery/albums/u..._fix~0.pdf You never actually own a Defender. You merely look after it for the next generation. http://youtu.be/yVRlSsJwD0o https://youtu.be/vmPr3oTHndg https://www.youtube.com/watch?v=_GtzTT9Pdl0 https://www.youtube.com/watch?v=ABqKPz28e6A https://www.youtube.com/watch?v=rLZ49Jce_n0 https://www.youtube.com/watch?v=XvAsz_ilQYU https://www.youtube.com/watch?v=K8tMHiX9lSw https://m.youtube.com/watch?v=dxwjPuHIV7I https://vimeo.com/201482507 https://www.youtube.com/watch?v=ZSixqL0iyHw

29th Sep 2019 7:33pm

bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1923

Cheers mick Wow that’s hell of a job ericvv thanks for the link, I don’t think mine has that issue though it’s been fine for the last 9 years and just recently started, theres a big difference between the both sides, drivers is quite cold but the passenger side warm almost hot 🥵 2016 Range Rover Autobiography 4.4 TDV8 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)

29th Sep 2019 7:49pm

blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17480

ericvv wrote: bear100 wrote: not what I wanted to hear! Any idea on the fix ericvv Here you go. Mind this is just the fix for the difference between left/right side heater output. Nothing to do with a stuck valve not allowing fully cold air. Eric https://www.defender2.net/gallery/albums/u..._fix~0.pdf Be aware that this doesn't fix anything, it's a nasty (expensive) bodge which lessens the discrepancy. A custom cross-flow heater matrix would be the only solution.

29th Sep 2019 8:50pm

cold Member Since: 15 Dec 2018 Location: Yorkshire Posts: 118	I had a problem with the left side cold right side warm - the solution was a top up of aircon gas
30th Sep 2019 6:37pm

bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1923

Thanks blackwolf Cold I is was thinking the same because the cold setting wasn’t really that cold and on some occasions you could see the cold vapour from the air vents when working correctly, which I haven’t for a while, I may try that first It’s only around £30 for a re-gas  2016 Range Rover Autobiography 4.4 TDV8 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)

30th Sep 2019 7:18pm

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