temp light

[boyob32]

I had the dreaded temp light cone on today, then disappear.

Coolant level fine, pump and belt changed 3000 miles ago, heating working and engine temp nicely on 90. Any ideas??

[pickles]

dodgy switch/sender, wiring fault perhaps

[richw911]

Corroded sensor in the coolant botttle 

[boyob32]

Ahhh the one thing I didnt think, will check that out! Cheers 

[richw911]

Ahhh the one thing I didnt think, will check that out! Cheers 

A bottle is about £12 brand new from vw 

[boyob32]

Cool. Another question, today I also had a drop in my revs while idle which then stabilised, early to tell I know, but could this be the temp sender?

[richw911]

Cool. Another question, today I also had a drop in my revs while idle which then stabilised, early to tell I know, but could this be the temp sender?

Maybe, could need a throttle body clean 

[boyob32]

Thats the more preferable outcome! Think I might give the car some new / cleaner parts this weekend! Well see how it works out!

[richw911]

Thats the more preferable outcome! Think I might give the car some new / cleaner parts this weekend! Well see how it works out!

Scan it for fault codes first http://www.golfgtiforum.co.uk/index.php?topic=87783.0