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Old 06-29-2020, 07:24 PM
AttorneyinSC AttorneyinSC is offline
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2014 GC - A/C cools when driving, but not when idling

My A/C used to cool colder than ice very quickly after startup. Recently it started to require driving for it to cool, and even then itís not as cold as it used to be. Thoughts on causes?
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Old 06-30-2020, 03:47 AM
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BMW IHKA HVAC incorporates a cold start-up prevention. It may be more noticeable during one season than another. It requires some engine heat for temperature control before full cooling capabilities are enabled. The BMW IHKA HVAC is not intended or designed to provide a frigid blast but to gently maintain set cabin temperatures.

I have posted the technical description of IHKA many times. www.newtis.info includes IHKA HVAC troubleshooting information. The capacity test is the same across all platforms that I have studied.
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Old 06-30-2020, 06:18 AM
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Just in case you don't know or forgot...where is your stratified air dial set on the dash's center vent?
When was the last time the interior recirculation filters replaced?
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Old 07-04-2020, 12:23 AM
Robin750 Robin750 is offline
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If the AC is no longer blowing cold, the most likely cause is low refrigerant. Even though the system is sealed, some refrigerant will be lost through the compressor when it is running. Given the age of the car, it may be normal loss and the system just needs to be evacuated and refilled to the specified amount.

Below is the article about refrigerant:

https://www.newtis.info/tisv2/a/en/f...eck/1VnYI6BJG5
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Old 07-04-2020, 03:25 AM
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Quote:
Originally Posted by Robin750 View Post
If the AC is no longer blowing cold, the most likely cause is low refrigerant. Even though the system is sealed, some refrigerant will be lost through the compressor when it is running. Given the age of the car, it may be normal loss and the system just needs to be evacuated and refilled to the specified amount.

Below is the article about refrigerant:

https://www.newtis.info/tisv2/a/en/f...eck/1VnYI6BJG5
Did YOU read your linked article with understanding? Particularly the part about permissible leak rate, 30 grams 1 ounce per year up to 150 grams 5 ounces before it is permissible to recharge.

BMW HVAC is ECE type accepted and very robust and ECE allows interference only by licensed TECHNICIANS - not shadetree mechanics.
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
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Old 07-04-2020, 12:41 PM
Robin750 Robin750 is offline
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Quote:
Originally Posted by Doug Huffman View Post
Did YOU read your linked article with understanding? Particularly the part about permissible leak rate, 30 grams 1 ounce per year up to 150 grams 5 ounces before it is permissible to recharge.
Not sure what is the point that you're trying to make. Without evacuating the system, how can you tell whether the leak rate is permissible?

Quote:
Originally Posted by Doug Huffman View Post
BMW HVAC is ECE type accepted and very robust and ECE allows interference only by licensed TECHNICIANS - not shadetree mechanics.
I never suggested this was something you can DIY. It's always better to be equipped with some knowledge beforehand when going to the dealer.
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Old 07-17-2020, 01:43 PM
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Quote:
Originally Posted by AttorneyinSC View Post
My A/C used to cool colder than ice very quickly after startup. Recently it started to require driving for it to cool, and even then itís not as cold as it used to be. Thoughts on causes?
Just to verify...are you driving in Eco Pro mode? If you are, it affects the AC.
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2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 2013 F06 650ix Gran Coupe` (Black Sapphire) 1/13 mfg date
(SOLD)
97 740iL (Arctic Silver) <<~>> 99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

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