Sorry to bump this folks, but does anyone know where the cabin air con temp sensors are please? Not the ambient one just above the clock, but there must be left and right for the driver/passenger zone control? Really can’t face a trip to London with passengers and no air con!

Thank again in advance,

Si. FFRR 4.2SC/KTM 990SMT Current and cherished.
Honda Accord 2.4 Vtec touring. (Yeah, I know, think: Kids)
Mitsubishi Pajero Evolution Nut-wagon. and a Buell XB12R
TVR Griffith 5.0 (backed up with Vauxhall Carlton road barge for the weekly shop.)
Honda Integra Type R DC2 Possibly the best drivers car. Ever.
Mitshibishi FTO GPX MIVEC.
Honda CRX Vtec Mk2 -NO, Not the del sol!!!
Volkswagen Scirocco GT
Mini 1275GT
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I'm going to stop now.....

Si,

Does sound quite similar to my own experience.
I'd suggest the refrigerant control valve as a likely culprit - it's a commonly occurring problem.

Have a look at this thread - https://www.fullfatrr.com/forum/topic43778...ed+air+con

Warwick 2011 L322 TDV8 A/b Orkney Grey
2008 Defender 90 XS TDCi Java Black
2002 L322 TD6 Vogue Zambezi Silver (gone but not forgotten)
And one or two bikes - Ok, maybe more than one or two....

The pressure control valve issue is widely known on the 4.4 TDV8 as linked, but not so much your engine.

That said, they are common culprits in any air conditioning system on any car. My symptoms were:
- air con would work well sometimes
- a burst of acceleration over 2,300 RPM fired the air con into life
- lots of idling traffic / slow speed and no air con

Plenty of gas in the system. When Halfords tested it, they confirmed loads on the high side and none on the low side confirming my PCV (the test was free).

I'd also used the GAP tool and the cabin temperature sensors were working fine - so may be something you're able to do. If you're getting a temperature reading from the sensors, then neither are open loop.

You could also have a faulty clutch on the a/c compressor.

You could also have a blocked condensate pipe, although you'd probably expect to see the compressor running.

For me, Halfords vacuumed out the gas for free, I changed the air con compressor for a new one and then got Halfords to recharge for me and all has been well since. 2015 Range Rover Autobiography 4.4 SDV8

Kiss My Carbon Footprint wrote:

Si,

Does sound quite similar to my own experience.
I'd suggest the refrigerant control valve as a likely culprit - it's a commonly occurring problem.

Have a look at this thread - https://www.fullfatrr.com/forum/topic43778...ed+air+con

Warwick

Thanks for the response, much appreciated. Think I’d still like to check on the temp sensors though as that’s what the error message is saying. Reading through that thread it looks like Ross at Grenlands sounds a good bet for proper diagnosis too. Not a million miles from me as I’m in Dorset. Still like to know where those damned temp sensors are!  FFRR 4.2SC/KTM 990SMT Current and cherished.
Honda Accord 2.4 Vtec touring. (Yeah, I know, think: Kids)
Mitsubishi Pajero Evolution Nut-wagon. and a Buell XB12R
TVR Griffith 5.0 (backed up with Vauxhall Carlton road barge for the weekly shop.)
Honda Integra Type R DC2 Possibly the best drivers car. Ever.
Mitshibishi FTO GPX MIVEC.
Honda CRX Vtec Mk2 -NO, Not the del sol!!!
Volkswagen Scirocco GT
Mini 1275GT
MG Midget (Heavily modified)
I'm going to stop now.....

garyRR wrote:

The pressure control valve issue is widely known on the 4.4 TDV8 as linked, but not so much your engine.

That said, they are common culprits in any air conditioning system on any car. My symptoms were:
- air con would work well sometimes
- a burst of acceleration over 2,300 RPM fired the air con into life
- lots of idling traffic / slow speed and no air con

Plenty of gas in the system. When Halfords tested it, they confirmed loads on the high side and none on the low side confirming my PCV (the test was free).

I'd also used the GAP tool and the cabin temperature sensors were working fine - so may be something you're able to do. If you're getting a temperature reading from the sensors, then neither are open loop.

You could also have a faulty clutch on the a/c compressor.

You could also have a blocked condensate pipe, although you'd probably expect to see the compressor running.

For me, Halfords vacuumed out the gas for free, I changed the air con compressor for a new one and then got Halfords to recharge for me and all has been well since.

Thanks Gary, much appreciated. It doesn’t seem that my compressor is even spinning up at all so I wonder if it’s a sensor before all of that. Complicated stuff air con!  FFRR 4.2SC/KTM 990SMT Current and cherished.
Honda Accord 2.4 Vtec touring. (Yeah, I know, think: Kids)
Mitsubishi Pajero Evolution Nut-wagon. and a Buell XB12R
TVR Griffith 5.0 (backed up with Vauxhall Carlton road barge for the weekly shop.)
Honda Integra Type R DC2 Possibly the best drivers car. Ever.
Mitshibishi FTO GPX MIVEC.
Honda CRX Vtec Mk2 -NO, Not the del sol!!!
Volkswagen Scirocco GT
Mini 1275GT
MG Midget (Heavily modified)
I'm going to stop now.....

If you get someone with the proper diagnostics or GAP tool (i have a GAP tool and live in Southampton - would need another member to confirm if the tool can be used to see live values on other cars without unlocking), they'll be able to see the live values for your cabin temperature sensors, evaporator temperature to confirm the system is getting cold enough, and that your compressor clutch is functioning. They may also be able to obtain some more insightful fault code detail. 2015 Range Rover Autobiography 4.4 SDV8

Can you tell me where in the iid those values are please?

garyRR wrote:

If you get someone with the proper diagnostics or GAP tool (i have a GAP tool and live in Southampton - would need another member to confirm if the tool can be used to see live values on other cars without unlocking), they'll be able to see the live values for your cabin temperature sensors, evaporator temperature to confirm the system is getting cold enough, and that your compressor clutch is functioning. They may also be able to obtain some more insightful fault code detail.