Go Back  AudiWorld Forums > Audi Models > Audi A4 > A4 (B5 Platform) Discussion
Reload this Page >

Help with Thermostat issues!!! New Member

A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Help with Thermostat issues!!! New Member

 
Old 02-13-2010, 07:45 AM
  #1  
AudiWorld Newcomer
Thread Starter
 
Join Date: Feb 2010
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default Help with Thermostat issues!!! New Member

I have an 01 A4 1.8T. The thermostat gauge sits at cold, intermittently, and I get heat out of the vents. I was thinking that it could be a sending unit or gauge. I would like to test the senors/sending units but dont know were they are at. Can anyone help me...Thanks.

Hope to be on here more
jhawkaudi is offline  
Old 02-13-2010, 02:59 PM
  #2  
AudiWorld Member
 
hellbringer's Avatar
 
Join Date: Apr 2001
Location: Westchester, NY
Posts: 250
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by jhawkaudi View Post
I have an 01 A4 1.8T. The thermostat gauge sits at cold, intermittently, and I get heat out of the vents. I was thinking that it could be a sending unit or gauge. I would like to test the senors/sending units but dont know were they are at. Can anyone help me...Thanks.

Hope to be on here more
Coolant temp sensor. .there's a nice write-up in the tech section. Also if you replace it, which is very easy to do. ..make sure you get another sensor clip (passing the knowledge someone shared with me). Mine fell into never never land and I'm glad i had another one! Dealer in CT wanted $350 + 6% sales tax for a $20 part.

In another thread, I shared pictures since mine was the originial from a 98 A4 2.8. .now the temp sensor seems very accurate and moves right on up!
hellbringer is offline  
Old 02-15-2010, 04:06 AM
  #3  
AudiWorld Newcomer
Thread Starter
 
Join Date: Feb 2010
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default

were is it at in on the tech side. I looked for it and could not find it.
jhawkaudi is offline  
Old 02-15-2010, 05:29 AM
  #4  
Audiworld Junior Member
 
Join Date: Apr 2009
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by jhawkaudi View Post
were is it at in on the tech side. I looked for it and could not find it.
https://www.audiworld.com/tech/eng.html

AutohausAZ has a good price on a new one.

http://www.autohausaz.com/search/pro...ender%20Switch
darthlordrenn is offline  
Old 02-15-2010, 08:04 AM
  #5  
AudiWorld Super User
 
AudiMick's Avatar
 
Join Date: May 2002
Location: Redmond WA
Posts: 5,138
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by jhawkaudi View Post
I have an 01 A4 1.8T. The thermostat gauge sits at cold, intermittently, and I get heat out of the vents. I was thinking that it could be a sending unit or gauge. I would like to test the senors/sending units but dont know were they are at. Can anyone help me...Thanks.

Hope to be on here more
There are two sensors inside the coolant temp sensor, one for the gauge and one for the ECU. You can use VAG.com to check the sensors however it's a cheap repair so it's worth swapping the unit out to see if it fixes the problem.

Some people mentioned getting a replacement clip, make sure you remove the old o-ring and replace it also.

It could also be your thermostat, you will still get warm air if it's stuck open. The heater should be HOT at normal temp, OEM thermostats tend to fail open, aftermarket fail closed.

If if it is the thermostat don't leave it too long as it will cause the car to run rich.
AudiMick is offline  
Old 02-15-2010, 08:14 AM
  #6  
AudiWorld Expert
 
Reggie's Avatar
 
Join Date: Mar 2000
Location: Fort Collins Colorado
Posts: 31,446
Received 1 Like on 1 Post
Default

Here are the tech write ups for him on replacing the two sensors https://www.audiworld.com/tech/eng66.shtml

https://www.audiworld.com/tech/eng54.shtml
Reggie is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Boosted01tt
1.8T Discussion
5
01-03-2017 05:55 PM
A4 Lemon
A4 (B7 Platform) Discussion
3
10-02-2015 09:57 AM
bebopdeluxe
A6 (C7 Platform) Discussion
3
09-05-2015 04:11 PM
stormchaser1967
New Member Welcome Area
0
09-01-2015 01:29 PM


Thread Tools
Search this Thread
Quick Reply: Help with Thermostat issues!!! New Member


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: