HVAC Coolant temp check question

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11-07-2006, 04:37 AM

CTallroad

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HVAC Coolant temp check question

So I'm checking the temperature for fun on my new tt and wondering what this function actually checks:

On a cold morning, not garaged, just freezing weather, at first start up, the HVAC display will show 30 degrees Celcius - when I know the engine/coolant is all at 0 Celcius.

What does this function actually measure? Or is this just a case of Audi putting in a little fuzzy factor?

Charlie
02 ttqc
01 allroad

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11-07-2006, 04:45 AM

XCLR8TT

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Probably just the low end of the scale since once warmed and running it will never be below that.

It's either that or your car wants you to move to a warmer climate.

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11-07-2006, 06:02 AM

maaliish

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check block 49. 51 is a learned value. I think I've seen my 49 as low as 14, maybe even lower.

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11-07-2006, 06:49 AM

jhoeppel

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where is a reference to these blocks? the list i've printed appears not to be TT specific

and I can't quite find it in my Bentley. My listing of HVAC readout blocks doesn't indicate block 49 as temp-related. But whatever it's measuring, I have noticed it much more responsive than block 51, which will rise until it hits 90c and stay there pretty much without budging.

TIA