Get it serviced. Could be something as simple as a blocked filter or needs regassing.
Hi Guys.
The aircon in my D4 is not working as well as it used to. Noticed it over the last several days. It still cools but is not cold like it normally is. I've got a GAPIID tool and looked at the ventilation figures but it's all Greek to me. Out of warranty so I'm on my own from that point of view.
Any ideas or suggestions?
Martin
Get it serviced. Could be something as simple as a blocked filter or needs regassing.
All automotive compressors have a rotary mechanical seal. They *all* leak. Some leak faster than others. With the global trend towards smaller and smaller gas charges, the leak as a percentage of overall charge becomes quite significant.
I did our D3 last year and it was 150g short. That extra 150g of gas in a half-kilo system makes a huge difference in available capacity on a hot day.
I recommend people get their system re-gassed every 2 or 3 years. As the charge level falls, and well before it falls enough for you to notice, it starts to impede oil circulation and the lubricant slowly migrates to the evaporator starving the compressor. When the compressor goes, it's a compressor, condenser, dryer, TX valve, line flush, evaporator flush. Messy and very expensive.
Yes it's a worst case, but a hundred bucks for a re-gas every couple of years is cheap insurance.
Failing that the valve that controls the variable compressor is known to fail. LR suggest a compressor replacement however the valve can be replaced independently. I have one on my shelf ready to be installed
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
Thats the most common issue with theses vehicles.
Auto air compressors have extremely good seals these days, and don't weep like the older types.If the gas charge has dropped there is more than likely a leak somewhere that needs repairing.A trace of oil on the pipework or fittings is a good indication where the leak is,although leaks can appear dry at times with no trace of oil.
A trip to a good auto AC guy is the go.
Paul
D2,D2,D2a,D4,'09 Defender 110(sons), all moved on.
'56 S1,been in the family since...'56
Comes out of hibernation every few months for a run
I took mine to the AC dudes and they diagnosed the control valve. Unlike a VW model that suffer from Black Death, the prognosis was faulty pressure control valve. The pressures aligned to a working system however the 10 minute delay to cooling and the overall lack of cooling pointed to the control valve.
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
Thanks for the info guys.
I was thinking along the lines of a re-gas but threw it out there for your collective wisdom. Thought there may possibly have been a simple clean a filter job that I may have been able to do myself that I was unaware of. Funny how they hit a tipping point and you notice the change. Shouldn't complain, it's over 5 years old now.
Anyone in Sydney know a good AC workshop? I live near Parramatta but would rather travel and get good workmanship and service.
Martin
Hi Letherm as DiscoMick suggested do you know about the pollen filter behind the glovebox?
I’m interested to know from others if this could get so blocked on a dusty trip as to restrict cooling performance?
I imagine the air flow would be noticeably restricted.
Hi PerthDisco.
Not that simple unfortunately. It was replaced at the annual service in November. The dealer has done it every year and I drive in the city so it's probably not the cause. Then again, Sydney has its share of pollution. I'll check it out though just in case.
Martin
Is the heater completely closed off when the control is set to cool?
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