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Air conditioning issues 

 

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 Post subject: Air conditioning issues
Posted: Mon Oct 28, 2013 11:48 am 
Parts Gopher
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My air only works at low speeds up to 40kph. If the car goes up to hiway speeds the a/c stops working.
What do I check first please?

 

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 Post subject: Re: Air conditionong
Posted: Mon Oct 28, 2013 4:06 pm 
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Andrew S wrote:
My air only works at low speeds up to 40kph. If the car goes up to hiway speeds the a/c stops working.
What do I check first please?



Stops working.....????....what bit??? , the cold, the fan, the vents change.....????

 

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 Post subject: Re: Air conditionong
Posted: Mon Oct 28, 2013 5:40 pm 
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 Post subject: Re: Air conditionong
Posted: Mon Oct 28, 2013 5:44 pm 
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I believe that the air conditioning will not work at throttle percentages over 85%, and it's designed that way to aid acceleration.

Gab
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 Post subject: Re: Air conditionong
Posted: Mon Oct 28, 2013 5:47 pm 
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Gab1 wrote:
I believe that the air conditioning will not work at throttle percentages over 85%, and it's designed that way to aid acceleration.

Gab




if that "is" what they mean ... then yes that sounds right to this "L" plater..... :mrgreen:
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 Post subject: Re: Air conditionong
Posted: Mon Oct 28, 2013 7:23 pm 
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cjh wrote:
Andrew S wrote:
My air only works at low speeds up to 40kph. If the car goes up to hiway speeds the a/c stops working.
What do I check first please?



Stops working.....????....what bit??? , the cold, the fan, the vents change.....????


There is air but it is not cold. I don't think the 85% applies. 100kph does not require much throttle. The a/c people suggest the evaporator is icing up and forming a solid block.
Short of pulling the dash apart they suggest turning the a/c off for a while until the ice melts.
Otherwise a new evaporator thermostat is required.....
Does this sound reasonable?

 

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 Post subject: Re: Air conditioning issues
Posted: Tue Oct 29, 2013 1:04 am 
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So put your Climate control in diagnostic mode and look at evaporator temp in real time to see if that's the case.
documents.php?d=9

I'm of course assuming the car is as what's in your profile.

 

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 Post subject: Re: Air conditioning issues
Posted: Tue Oct 29, 2013 10:42 am 
Parts Gopher
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Thank you for that link, I had no idea of its existence.

Have performed all the tests and no errors were logged.
Just one point...the evaporator temp reads around 16 - 17 degrees...Is this about right, and does this temperature fluctuate?

 

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 Post subject: Re: Air conditioning issues
Posted: Tue Oct 29, 2013 11:19 am 
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Depends on what temp you've set. That's not low enough, needs to be down to around 5°c.

If the compressor is engaged continuously for your figures, you're most likely low on gas charge.

 

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