HVAC readings for 49 and 51 steady at 90, but gauge reading 1 notch past middle suddenly
Thread Starter
Audiworld Junior Member
Joined: Apr 2002
Posts: 94
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HVAC readings for 49 and 51 steady at 90, but gauge reading 1 notch past middle suddenly
Hi,
I reviewed all posts doing a search, and couldn't find a case like mine. I had steady gauge readings for the 6 years I have had my 2002 TT.
After my last service, the gauge started to move freely past middle towards the next notch. Moving at speed moves the needle towards the right. High revs does the same. Low revs at speed moves it closer to middle. All tests with HVAC showed steady readings, a little hotter than 90 for reading 49 in some cases when I was gunningit.
I have removed the coolant res cap and will leave overnight to see if there are air bubbles cauing this, but am not confident. Does anyone have any insight as to what may be causing this, especially after not having any problems up until my last service? Your help would be greatly appreciated!
Diz
I reviewed all posts doing a search, and couldn't find a case like mine. I had steady gauge readings for the 6 years I have had my 2002 TT.
After my last service, the gauge started to move freely past middle towards the next notch. Moving at speed moves the needle towards the right. High revs does the same. Low revs at speed moves it closer to middle. All tests with HVAC showed steady readings, a little hotter than 90 for reading 49 in some cases when I was gunningit.
I have removed the coolant res cap and will leave overnight to see if there are air bubbles cauing this, but am not confident. Does anyone have any insight as to what may be causing this, especially after not having any problems up until my last service? Your help would be greatly appreciated!
Diz
Thread Starter
Audiworld Junior Member
Joined: Apr 2002
Posts: 94
Likes: 0
Re: First...>>
Thanks for the follow up. The car is @ 25000 miles on it (garage queen). I had the the 60000 miles service done...coolant was checked and topped off according to the bill. Nothing else done.
FYI, I have the black sensor, and I just tried the trick of scraping the sensor rods in the reservoir with a screwdriver. Will see what happens tomorrow morning.
FYI, I have the black sensor, and I just tried the trick of scraping the sensor rods in the reservoir with a screwdriver. Will see what happens tomorrow morning.
AudiWorld Super User
Joined: Nov 2003
Posts: 2,006
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That's not the sensor Steve is talking about... >>
scraping the sensor within the coolant reservoir is the fix for your car thinking the coolant is low when it's really not--it doesn't have anything to do with reading coolant temps.
The <b>coolant temp sensor</b> is on the other side of the engine. It's really a 5-min fix. Check the link below.
~john<ul><li><a href="http://forums.vwvortex.com/zerothread?id=1287042">< Vortex 'how to' with pics, from MarTT's post in the FAQ ></a></li></ul>
The <b>coolant temp sensor</b> is on the other side of the engine. It's really a 5-min fix. Check the link below.
~john<ul><li><a href="http://forums.vwvortex.com/zerothread?id=1287042">< Vortex 'how to' with pics, from MarTT's post in the FAQ ></a></li></ul>
AudiWorld Uber User
Joined: Dec 2000
Posts: 53,281
Likes: 2
Yup...This one...>>
In roughly the same place on a 225
<img src="http://images105.fotki.com/v439/photos/7/7305/776256/temp-vi.jpg">
<img src="http://images103.fotki.com/v414/photos/7/7305/776256/Picture049-vi.jpg">
<img src="http://images105.fotki.com/v439/photos/7/7305/776256/temp-vi.jpg">
<img src="http://images103.fotki.com/v414/photos/7/7305/776256/Picture049-vi.jpg">
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